Over the last? Res ann? Are we assist? ? the appearance of the journ? e cam? flush night surveillance, all dowry? are a “miracle” capacity? ? amplified by several hundred folds of the cam? ra “minimum illumination” by the removal of IR filter and? dyeing circuit color. Usually, the sensitivity? mode varies from day one? 0 lux. 25 lux and jumps? 0. 01 ~ 0. 0001 lux for the night of the camera (B / W) mode. This “miracle” increase is not true, it is a measuring device by exposing the CCD (Charged Coupled Device)? High power ‘? mission infrared pr? cisant wrong? value tr? s low lux. Lux and the infrared power are not the m? My. Lux is a unit? photometer? metric that measures the point? point? lighting (depending on the quantity? the light for irradiated? e and the distance between the light source and object? clear?) while the infrared power is a unit? Radiom? cudgel – measured? e Watts. Enlightenment, it is possible for us to see any infrared radiation is invisible? the human eye. The distinction between? Lighting and infrared radiation in the en? Sequences, or the wavelength. The wavelength of the visible spectrum s’? Tends 400 nm (violet)? 700nm (red) which is divided into a rainbow of colors from red? orange? yellow? green to blue and violet. CIE (International Commission on Illumination) also known as the International Commission for the? Lighting, clearly indicated? measuring the light? re, known as the photometer? sorts, only applies? the visible light spectrum and includes common? s such as slow light? re, candle and lux. Measurements of the man ‘? He d? Protection capacity? showed? the efficiency? is the most? lev? e? color green (100%? about 555 nm) and it decreases? 50% pr? S Orange (about 610 nm) and blue (about 510 nm) and less than 10% pr? S red (around 650 nm) and violet (around 470 nm). The? Human beings can not feel waves radiated? Are in the ultraviolet (below 400 nm) or infrared (sup? Interior? 700 nm) r? Regions. ICE standards are quite complex, but suffice to understand that the value of a source the light for green (555nm) with 1W Lumen is? scabies? 683 lumens, which from a point of measuring point is? Scabies? 683 Candela. In contrast, 1W red (650 nm) light output is? Gal? only 68 and 68 candela lumen and 1W-infrared (700 nm) light radiant flux? re is? scabies? 0, 0 and 0 lux candela. The problem? Me is that few people know what lux and infrared radiation are, or how? Lighting and radiation are measured? S. One device for measuring the? Lux lighting is the? Clearly m? Very,? Also known as a photometer? Be. The meter the light for includes a filter and is stallions? to measure only unit? s the light for the visual spectrum of optics such as? finished by the CIE. This filter is similar to the IR cut filter emp? Loved one to pass infrared radiation in order to maintain the pr? Measurement accuracy. That’s why all the counters of known exposure luxm: station and? Lighting of the? Equipment Measuring read or 0 lux? an r? sidual when exposed to infrared radiation. In CCTV m station with light? Re are used? S to measure the illumination of the sc? Not observed? E by a cam? Ra of the container dimensions, but should never? Be used? to measure the infrared radiation, because its reading will be 0 lux, or r? SIDU as 0. 001 lux, whereas the sc? Can? Be expos? ? of quantity? s whatever they want saddles of infrared radiation. To understand tr? Full well the impact that these measures? design a system? CCTV me we must first understand how a CCD (Charged Coupled Device) works. The CCD is stupid? U to like? human eye, with colors similar to? protection of effectiveness?. Therefore, the CCDs are more sensitive to green (550 nm) r? Region of the spectrum and decrease the sensitivity? ? 0 in the ultraviolet (400 nm) r? Region. CCDs, however, no longer feel the infrared and 700nm? 1000nm (some are more sensitive and can d? Detect up? 1200nm). The sensitivity? CCD is much lower in the r? IR region and efficacy? fall? only 5-10% or less, as the chart shows typical CCD performance. M? Me if the efficiency? d? sensor protection in the r? infrared region is very? s low during the journ? e infrared radiation which is strongly radiated? e by the sun, hot objects, the human body or incandescent? halogen? should? be emp? ch? s to reach the CCD color. If IR is radiated? E in the optical path of a color CCD, it disruptive heavy processing images in color. Therefore, all the colors (or CMOS) sensor is CCD? Very? Quip? an IR cut filter that blocks infrared radiation to reach. As explained? above, the sensors are much less sensitive to infrared radiation that the visual spectrum. By stupid? Fore, the notion that the suppression of anti-IR filter increases the sensitivity? the apparatus of a hundred or a thousand times is a simple case of the distortion induced by wrongful use of a photometer? be to measure the infrared radiation. The common test inaccurate for the night mode of a cam? Ra Day / Night is performed? by introducing a powerful infrared radiator (improperly call? e IR illuminator) to the infrared radiation on a si? sank. The test is r? Alis? connecting a cam? ra CCTV (with IR cut filter removed? e)? a waveform analyzer to measure the output signal. The cam? Ra day / night is placed? to observe a si? do infrared irradiated? s. Apr? S that posem? Is positioned be? On e si? Not to measure the infrared radiation in lux. This is a test that misleading g? N? Of re r? Erron results? S. We will obtain an IR-induced B / W signal in the waveform analyzer with a value such as 20 IRE, while posem? Very read 0 lux or an r? Sidual as 0. 01 ~ 0. 0001 lux, which is used? in the data sheet of the camera? finish the sensitivity? or his? minimum lighting. You? Be aware that the IRE is a unit? signal level or strength and is not associated? ? infrared radiation in any fa? it. Good, but more “? Hard evidence” school of sensitivity? a cam? ra surveillance or? minimum lighting is performed? in pla? ant a standard source 2000 lux with a focus in front of the cam? ra (religious?? analyzer waveform) with IR cut filter removed?. Apr? S the initial registration are ins? R?’re Facing source the light for up? the signal vid? o measured? e fall? 20 IRE. The? Minimum lighting of being very calculating? on a factor of r? reduction of the density? neutral density filter. Neutral density filters are available in diff? Different factors of transmission and r? Reduce the intensity? light by ratios such as?, 1 / 16, 1 / 50, 1 / 100 etc. The density filters? are very neutral? s like? those used? s in the objectives? auto iris? chip. That’s why whenever you see one cam? Ra day / night with? Minimum lighting values as 0. 001 lux or 0 m? Me. 001 lux, try to keep? one thing in mind – the strat? gies marketing, sometimes more weight than common sense.
Posts Tagged ‘Infrared’
Lumi? St and infrared radiation in the system? My vid? Osurveillance
Thursday, September 2nd, 20102. 5 inch CMOS wireless Baby Monitor with Infrared Camera flower
Tuesday, August 3rd, 2010With a range of wireless effective 100m (330ft), our monitoring of children and control system will help you keep an eye on your family if you are in or outside the home. Our system has 628 x 582 resolution color CMOS, four channels to avoid potential interference, and integrated microphone for audio monitoring. It also has a effective night vision range of 5m (16ft), so you can monitor your children while they sleep. This monitor wireless baby is different with other more ordinary, coming with a flower infrared camera, it’s interesting for our babies. As a parent, he is so tired that you have to stay with your baby and take care of him all the time, but when you get this wireless monitor, baby you can take it easy when you care for your baby . It is $ 99. 99 szprice. com now, here are the details of this appendix useful wireless baby monitor: http://www. szprice. com/products/2-5-Inch-1-3-inch-CMOS-Cordless-Baby-Monitor-With-Flower-Infrared-Camera_426. Specifications HTML2. 1/3-inch CMOS sensor transmission 4GHz 628 x 582, 380 lines TVRécepteur wireless 2. 5 “TFT-LCD with 640 x 240Appareil photo comes from the form factor of a flower with adjustable stem, includes a soft nightlight that can be activated and deactivated by pressing the branch of flowers, which are low enough not to disturb children in their sommeilVision night: 9 infrared illuminators see in total darkness for effective up to 5 m (16 ft) microphone for monitoring audio4 channels optional to avoid possible interference of signalJusqu’à 100m (330ft) transmission range space librecaméra High quality color wireless CMOS sensor: 628 x 582définition Horizontal: 380 lines TVIllumination minimum: 0 Luxformat video PALTransmission / Receiving frequency: 2,400 MHz ~ 2,483 MHzPuissance Issue: 10 mWPuissance: Camera: DC + receiver 8 V: +5 V DCTempérature Range: -10 to 50 degrees C or 14 ~ 122 degrees FHumidité Operating: less than 85% HRPériode Warranty: 1 andana packaging sales détailContenu Package 1 x without Lovely Wireless Baby Monitor and Camera 1 x receiver with TFT LCD 1 xUser Manual
Light and infrared radiation in CCTV systems
Friday, April 9th, 2010In recent years we have witnessed the appearance of the day and night surveillance cameras, all featuring a “miracle” to boost capacity by several hundred folds of the camera “minimum illumination” by the withdrawal of the filter IR and turning off the circuit of color. Usually, the sensitivity varies from day mode from 1 to 0 lux. 25 lux and jumps to 0. 01 ~ 0. 0001 lux for the night of the camera (B / W) mode. This “miracle” increase is not true, it is a measuring device by exposing the CCD (Charged Coupled Device) High-power infrared emission and hurt a value indicating very low lux. Lux and the infrared power are not the same. Lux is a photometric unit that measures point to point lighting (depending on the amount of light irradiated and the distance between the light source and the illuminated object) while the power unit is an infrared radiometric – measured in watts . Enlightenment, it is possible for us to see all Infrared radiation is invisible to the human eye. The distinction between light and infrared radiation in the frequency or wavelength. The wavelength of the visible spectrum ranges from 400nm (violet) to 700nm (red) which is divided into a rainbow of colors from red to orange to yellow to green to blue and violet. CIE (International Commission on Illumination) also known as the International Commission on Illumination, clearly indicated the extent of light, known as photometry, applied only to the visible Optical spectrum and includes units such as slow light, candle and lux. Measures of human eye detection capacity showed that efficiency is highest in the color green (100% to about 555 nm) and decreases to 50% near Orange (about 610 nm) blue (about 510 nm) and less than 10% by red (around 650 nm) and violet (around 470 nm). Humans can not feel waves radiated in the ultraviolet (below 400 nm) or infrared (above 700 nm) regions. ICE standards are quite complex, but suffice to understand that the value of a source of green light (555nm) with 1W Lumen is equal to 683 lumens, which from a point of measurement point is equal to 683 Candela. However, 1W red (650 nm) light output is equal to only 68 and 68 candela lumen and 1W-infrared (700 nm) light radiant flux is equal to 0, 0 and 0 lux candela. The problem is that few people know what lux and infrared radiation are, or how light and radiation are measured. One device for measuring the illumination in lux is the illuminance meters, also known as a photometer. The meter includes a light filter and is calibrated to measure only the light units in the visual spectrum optical as defined by the CIE. This filter is similar to the IR cut filter to prevent infrared radiation to pass to maintain the accuracy of measurement. That’s why all the counters of known exposure, light meters and lighting equipment as 0 lux reading or a residual value when exposed to infrared radiation. CCTV In light meters are used to measure the illumination of the scene observed by a security camera, but should never be used to measure infrared radiation, because the reading will be 0 lux, or a residue as 0. 001 lux, while the scene can be exposed to substantial amounts of infrared radiation. In order to understand very well the impact that these measures have to design a CCTV system we must first understand how a CCD (Charged Coupled Device) works. The CCD is designed to resemble the human eye, with colors similar detection efficiency. Therefore, the CCDs are more sensitive to green (550 nm) region of the spectrum and decreased sensitivity to 0 in the ultraviolet (400 nm) region. CCDs, however, no longer feel the infrared 700nm and 1000nm (some are more sensitive and can detect up to 1200nm). CCD sensitivity is much lower in the IR region and the efficiency drops to only 5-10% or less, as the chart shows typical CCD performance. Although the effectiveness of the sensor in the IR region is very low, day and infrared radiation which is strongly radiated by the sun, hot objects, the human body and incandescent or halogen must be prevented reaching the CCD color. If IR is radiated in the optical path of a color CCD, it disruptive heavy processing images in color. Therefore, all colors (or CMOS) sensor CCD must be equipped with an IR cut filter that blocks infrared radiation to reach. As explained above, the sensors are much less sensitive to infrared radiation that the visual spectrum. Therefore, the notion that the removal of IR filter increases the sensitivity of the instrument a hundred or a thousand times is a simple case of the distortion induced by wrongful use of a photometer to measure the irradiation infrared. The common test inaccurate for the night mode of a day / night camera is done by introducing a powerful infrared radiator (improperly called Illuminator IR) infrared radiation on a dark stage. The test is done by connecting a CCTV camera (with IR cut filter removed) to a waveform analyzer to measure the output signal. The day / night camera is positioned to observe a scene infrared irradiation. After the meter is positioned on the stage for measuring the infrared radiation in lux. This is a test that generates misleading erroneous results. We will obtain an IR-induced B / W signal in the waveform analyzer with a value such as 20 IRE, while the exposure meter reads 0 lux or residual value, like 0. 01 ~ 0. 0001 lux, which is used in the technical specifications of the camera to set the sensitivity or the minimum illumination. You should be aware that the IRE is a unit of signal level or strength and is not associated with infrared radiation in any way. Good, but more “difficult time” school of the sensitivity of a surveillance camera or minimum illumination is performed by placing a standard source 2000 lux with a focus in front of the camera (connected to an analyzer way of wave) with its IR filter removed. After the first is inserted in front of the light source until the video signal drop measured at 20 IRE. The minimum illumination to be calculated on a basis of the reduction factor of neutral density filter. Neutral density filters are available in various transmission factors and reduce the light intensity ratios such as ½, 1 / 16, 1 / 50, 1 / 100 etc. The neutral density filters are very similar to those used in the objectives auto iris chip. That is why whenever you see a day / night camera with a minimum illumination values as 0. 001 lux or 0 even. 001 lux, try to keep in mind one thing – marketing strategies, sometimes more weight than common sense.
Light and Infrared Irradiation in CCTV systems
Friday, March 19th, 2010In recent years we have witnessed the emergence of CCTV cameras day and night, all featuring a “miracle” to boost capacity by several hundred folds of the camera “minimum illumination” by the removal of the filter IR and turning off the circuit of color. Usually, the day mode sensitivity ranges from 0 to 1 lux. 25 lux and jumps to 0. 01 ~ 0. 0001 lux for the night of the camera (B / W) mode. The increase in this “miracle” is not real is something to measure in exposing the CCD (Charged Coupled Device) with infrared emission of high power and specifying it in a sufficiently low value lux. Lux and infrared power are not the same. Lux is a photometric unit that measures point to point illumination (depending on the amount of irradiated light and the distance between the light source and the illuminated object) while the power unit is an infrared radiometric – measured in watts. Illumination makes possible for us to see in the infrared radiation is invisible to the human eye. The distinction between light and infrared radiation in the frequency or wavelength. The wavelength of the visible spectrum ranges from 400nm (violet) to 700nm (red) is divided into a rainbow of colors from red to orange to yellow to green to blue and violet. CIE (International Commission on Illumination) also known as the International Commission on Illumination, clearly stated the position of light, known as photometry, applies only to the visible spectrum Optical and includes units such as nit, lumen, lux and candela. The measurements of the human eye detection ability showed that efficiency is highest in the color green (100% to about 555 nm) and decreases to 50% near Orange (around 610 nm) and blue (around 510 nm) and less than 10% by red (650 nm) and violet (around 470 nm). Humans do not feel the waves radiated in the ultraviolet (below 400 nm) or infrared (above 700 nm) regions. IEC standards are quite complex but it suffices to understand the value of a source of green light (555nm) with 1W of light output is equal to 683 lumens, which for a point to measurement point is equal to 683 Candela. In contrast, 1W red (650 nm) light output equivalent to only 68 candela and 68 lumens 1W and infrared (above 700 nm) energy flow is equal to 0 Lumen, 0 and 0 lux candela. The problem is that few people know that Lux and infrared radiation, or how light and radiation are measured. One device for measuring the illumination in lux is the light meter, also known as a light meter. The cell includes a filter and is calibrated to measure only the light units in the optical spectrum in order as defined by CIE. This filter is similar to the IR cut filter prevent infrared radiation to pass to maintain the accuracy of measurement. Therefore, all known light meters, photometers and other lighting equipment capable of reading 0 lux or a residual value when exposed to infrared radiation. CCTV In light meters are used to measure the illumination scene observed by a security camera, but should never be used to measure infrared radiation, because its reading will be 0 lux, or a residual reading as 0. 001 lux, although the scene may be exposed to significant amounts of infrared radiation. To understand very well the significant impact that these measures have to design a CCTV system we must first understand how a CCD (Charged Coupled Device) is functioning. The CCD is designed to resemble the human eye, with colors similar detection efficiency. Therefore the CCD sensors are more sensitive to green (550 nm) region of the spectrum and drop to 0 of sensitivity in the ultraviolet (below 400nm) region. But CCDs can sense infrared radiation up to 700nm and 1000nm (some are more sensitive and can detect at 1200nm). The CCD sensitivity is much lower in the region and IR drop only 5-10% efficiency or less, as shown in a graph typical CCD performance. Even if the detection efficiency of the IR sensor of the region is very low, daytime infrared radiation which is strongly radiated by the sun, hot objects, the human body and incandescent bulbs or halogen must be prevented d attain the color CCD. If IR is radiated in the optical path of a color CCD, this will cause heavy disturbances in the processing of color images. Therefore every color CCD (or CMOS) sensor must be equipped with an IR cut filter that blocks infrared radiation to reach. As explained above, the sensors are much less sensitive to infrared radiation that the visual spectrum. Therefore, the notion that removing the IR cut filter increases the sensitivity of the camera a hundred or a thousand times is a simple case of distortion caused by improper use of a photometer to measure the radiation infrared. The common incorrect test mode for a night day night camera is performed by introducing a powerful infrared radiator (improperly called infrared illuminator) to the infrared radiation on a dark stage. The test is done by connecting a CCTV camera (with the IR cut filter removed) to a scan waveform to measure the output signal. The day / night camera is positioned to observe a scene irradiated IR. After the meter light is positioned on the stage to measure the infrared radiation in lux. This is a test that generates misleading erroneous results. We have an IR-induced B / W signal analyzer waveform with a value such as 20 IRE, while the exposure meter reads 0 lux or residual value, eg 0. 01 ~ 0. 0001 lux, which is used in the painting techniques of the camera to set the sensitivity or the minimum illumination. You should be aware that the IRE is a unit of signal level or strength and is not associated with infrared radiation in any way. The good, but more “difficult” test laboratory of the sensitivity of a surveillance camera or the minimum illumination is achieved by placing a standard source 2000 lux with a focus in front of the camera (connected to an analyzer form wave) with its IR filter removed. After the initial period are inserted in front of the light source until the video signal drops measured at 20 IRE. The minimum illumination to be calculated on the basis of factor neutral density filter reduction. Neutral density filters are available in different transmission factors and reduce light intensity by ratios such as ½, 1 / 16, 1 / 50, 1 / 100 etc. The neutral density filters are very similar to those used in auto iris lenses to chip. That’s why whenever you see a day / night camera with a minimum illumination values as 0. 001 lux or 0. 001 lux, try to keep in mind one thing – marketing strategies sometimes more weight than common sense.
