TWM346031U - Dual-layer protection mask device for surveillance photographing - Google Patents

Description

M346031 VIII. New description: [New technical field] The present invention relates to a day and night surveillance camera protective cover, in particular to a double-layer opaque protective cover having a translucent infrared band and a dual band capable of penetrating infrared and visible light.

M346031 [Prior Art] The Day% Night anti-theft surveillance camera combines a photographic lens with an infrared light source and placed it in a single-layer or double-layer transparent glass hood. People can see it during the day. The photographic lens and a plurality of infrared diodes (LEDs) as infrared light sources, when the infrared light source is activated at night, also clearly see the red light spot of the infrared light source emitting visible light. In this way, it is easy to expose the position of the anti-theft surveillance camera, day or night. In recent years, the security of the world has been ruined. The terrorist activities in Europe and the United States often cause the government departments to install more secure surveillance cameras in public facilities to prevent and deter the villains. For example, communities, urban roadsides, stores and public Locations, etc., in the event of theft, sexual assault or heavy, the situation can be restored by the images captured by the surveillance camera during the event. However, the advancement of technology has also led to advances in the evil knowledge and skills of thieves or terrorists. A clear example is the theft of surveillance cameras or the avoidance of surveillance sites. Therefore, the photographic device that camouflages hidden anti-theft surveillance is a Lu surveillance device that is urgently needed by advanced countries in Europe and America. Photographic devices for anti-theft surveillance are also capable of photographic imaging in places where ambient light is insufficient. Typically, an auxiliary light source, such as an illuminator, is provided. In the year of the International Safety Equipment Exhibition, small-scale anti-theft surveillance cameras were used, most of which combined the night vision auxiliary light source with the camera and placed them in the same casing for convenient construction. An infrared light-emitting diode called LEI is commonly used for auxiliary light sources, and is the cheapest and convenient night vision auxiliary light source on the market. The center wavelength is 85Qnm, and the single power is about 100mW. The finished products are often 12, 24, 36 or even more than 100 LEDs around the 7 M346031 ^7.3.27 correction - year, month, _, one, ^ Fill the perimeter of a board without a board, and a circular hole in the center of the board is placed directly around the camera lens. In recent years, the newly-produced day and night anti-theft surveillance cameras have mostly used double-layer transparent glass cover, and the double-layer transparent glass has a mask ring. This mask ring is only to avoid infrared light on the transparent glass plate. The reflection of re-reflection affects the imaging quality and does not obscure the exposure and presence of the camera lens and the LED light source. The light emitted by the LED light source is in the range of 850 nm in the infrared range, which is recognizable by the human eye (9 〇〇 nm). Therefore, the human eye often sees the red spot in the industry as "red burst", which is a nighttime night-proof type of anti-theft. The main reason for monitoring the position of the photographing device.

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M346031 w [New Content] The problems to be solved in this creation are as follows: The general day and night type anti-theft surveillance camera device exposes the existence of color cameras and infrared auxiliary light sources during daytime and nighttime surveillance photography. The technical solution adopted by this creation is: Replace the traditional double-layer transparent glass cover with a double-layered protective cover. The double-layered protective cover has two parts, an outer layer and an inner layer. The outer layer is a transparent glass sheet with dielectric coatings. The dielectric film material can pass the wavelength of visible light and infrared range, and the optical interference of the dielectric film causes high reflection on the front side of the outer layer to achieve specular reflection. Hide the effect. The inner layer is a black mask that can cut off visible light and infrared ray. A black hole is left in the center of the black mask to introduce the light source incident from the outer layer into the lens of the surveillance camera inside the shield. The center of the black mask is surrounded by the infrared light source of the LED to transmit infrared light from the infrared source and to cut off visible light from the black mask. Among them, the center wavelength of the LED infrared light source is 950 nm, which is a material of Shi Shenhua Zhong GaAs. It emits a pure infrared range that is invisible to the human eye (not visible to the human eye above 900 nm), and the black mask is opaque to visible light (not visible to the human eye). The technical effect of the technical scheme and features adopted by this creation: One of the effects of the creation, the transparent glass sheet coated with the dielectric film on the outer surface of the day and night type anti-theft monitoring and photographic device causes specular high reflection, and the inner black mask sheet In the case of a bottom layer, the color camera and the infrared light source in the outer layer of the photographing device are not visible to the human eye.

M346031 achieves the function of hiding. The second effect of this creation is that the transparent glass sheet of the outer dielectric film is transparent to the wavelengths of visible light and infrared, and does not affect the visible light and infrared in and out of the camera. The third effect of the creation is that the inner black mask piece is visible through the infrared light, and the cut visible light can be incident through a hollow hole left in the center of the black mask piece, and the incident light source can enter the lens of the surveillance camera. Internal imaging. In the center of the black mask, the infrared light emitted by the LE:D infrared light source can be penetrated, but the human eye can't see the infrared light emitted by the LED infrared light source, that is, there is no red burst. The phenomenon. Therefore, the presence of the LED infrared light source is not seen, and the hidden decorative effect is achieved. M346031 H27 Correction, Niuyue E| [Embodiment] Supplementary —------ί Please refer to Figure 1 for the color primary light primary color map. As shown in Fig. -, the three primary colors of ColorLight are the main center wavelength in fine red [_ light, green with a main center wavelength of 520 nm [Gr_light and blue [Blue] light with a main center wavelength of 460 nm. Referred to as RGB three primary colors, respectively, the color is optically known, and all visible light is composed of RGB three primary colors. • In the color mixing experiment, it can be seen that the three primary colors are mixed in equal amounts to obtain white light. If you mix the red light with the yellow light, the yellow light and the blue light, you can also get white light. Self-light can also be mixed by another color light. If the two colors are mixed, white light is called, and the two colors are called complementary colors. These two colors are called complementary colors. The important color of the complementary color: - the colored light is absorbed on the object of its complementary color, and is absorbed. For example, if a yellow (7) color object is illuminated with blue (8) light, the yellow object appears black. • Refer to Figure 1 A for the three primary colors of the colorant. I also know that the color of color can be divided into two categories: Achromatic Color and Chromatic Color. Achromatic refers to white, black, and different grayscale colors composed of white and black. The three primary colors of the color material are Cyan, Magenta, and Yellow, respectively. The additive method is a method in which color and light are mixed and colored. After the color light is mixed, not only the color and the color of the light mixed with M346031 ^7. 3. 21 years are different, but the brightness is also increased; the color reduction method is the color mixing and coloring ^^ color material mixing, not only forming a new one The color, while the brightness is also reduced. The additive color method is a color effect caused by two or more kinds of color light simultaneously stimulating the human optic nerve; and the subtractive color method refers to a color effect obtained by subtracting some color light from white light or other complex color light to obtain another color light stimuli. From the perspective of complementary relationship, there are basically three pairs of complementary colors (C〇mp〗 ementary eolors): R_C ; G-Μ ; B-Y. In the color-adding method, the complementary color is added to obtain white; in the color-reducing method, the complementary color is added to obtain black. The primary colors of the color light are red (R), green (G), and blue (β), and the three primary colors of the color are cyan (c), magenta (Μ), and yellow (γ). The human eye always sees the color light, and the determination of the three primary colors of the color material is inextricably linked with the three primary colors. Because cyan, magenta, and yellow use their own thickness (or concentration), the absorption of red, green, and blue light can be easily changed to complete the number of three primary colors that are fined into the human eye. Using cyan, magenta, and yellow bottles to illuminate, it is actually the spectrum of the light source from the illumination source + selective absorption of certain spectral colors, and the addition of color mixing with the remaining spectral color. As can be seen from Fig. 1A, a black color material can be obtained by mixing a CMY trichromatic color material with a mixture of RGB three color materials. Black (10) (8) as shown in Figure 1. Mix the three primary colors of cyan (C), magenta (8), and yellow (7) in the same proportion (C=100, Μ=1〇〇, γ=1〇〇) (c+M+Y=3〇〇) Into a black color body. If the cyan (〇, magenta (8), and yellow (7) and other three primary colors are not the same ratio M346031 hit · 3 2 7 repair j down - 乍月曰 X r ^ complement no ingredients (C=90, M=100, Y=110 Mixing (C+M+Y=300) can also be composed of black 1 - the same proportion of the three primary colors such as blue (Β), red (R), and green (G) (B=C+M=200 , R=M+Y=200, G=Y+C=200) Mixing (B+R+G=2C+2M+2Y=600) It can also form a black color body. If blue (B), red ( R), and the three primary colors such as green (G) are mixed in different proportions (B=C+M=220, R=M+Y=200, G=Y+C=180) (B+R+G=2C+ 2M+2Y=600) It can also form a black color body. Obviously, black (Black) produced by mixing the three primary colors of cyan (C), magenta (M), and yellow (Y) in different proportions. The black color produced by mixing the blue (B), red (R), and green (G) primary colors in different proportions. The degree of "black" in the black is different. The degree of "black" in black is in the general environment, the human eye is not easy to see through, that is, it is for the human eye. Opaque. In theory, after mixing the three primary colors of the color material, it should be able to absorb the red, green and blue light to obtain black (Black), but in reality, there is no such color material that the light absorption and reflection characteristics are perfect. After mixing the three color materials, some light will be reflected, but it will be dark gray or dark brown. In fact, in addition to black, the color of the three primary colors can not be mixed with many dark colors, in order to make up for this shortcoming, so the actual printing industry An additional black pigment is added to solve the problem that black cannot be produced. Therefore, there is a color mode called CMYK, and K means black. 13 M346031 %3.27 Correction of the month 曰p, _ In black color, the direct use of black pigment (κ) can not only achieve a more standard black, but also save the amount and price of the three primary colors. The general black pigment is mainly carbon black, because most of the light emitted from the light source is It is absorbed, so it appears black. When the particle size of carbon black is finer, the specific surface area of polymerization is large, More light is collected, making the feeling more black. Compared to the coarser carbon black, they reflect more light, making the observer feel less black. Carbon black particles not only exist in the form of primary particles, but also melt in the production process. It forms a polymer. Here, the structure of the polymer is very attractive, which makes the plastic processing and dispersion process difficult. Carbon black is roughly classified into coloring, UV protection, and electrical conductivity, and is used herein for plastic coloring. The ASTM standard defines the grades N110 to N990 according to the basic nanoparticle size (15 to 1 〇〇 nm). A part of the C-OH in the functional group on the surface of the carbon black has a portion of the infrared absorption spectrum in the infrared band of about 800 nm to 100 nm. Especially the main thing is that the black pigment particles are relatively coarse and cause scattering of light, so that infrared transmission is not possible. The phenomenon of light scattering is related to the size of the particles. When the particle size of the tiny particles is in the nanometer scale (Naro, 10 minus nine square meters), for example, the particle size is in M〇〇nm, called Naro Composites, nanoparticles. When the diameter of M〇〇nffl is smaller than the wavelength of visible light, the reflection and scattering of light will be significantly reduced, and even disappear into a transparent shape. Therefore, 'whether it is silk or fresh, as long as the particle age is too small to be very large. 14 Bamboo·3·27 Repair iL Pingyue Day·; Six sleeves without M346031 Significant descent scattering, which meets the transparency requirements of this embodiment. Of course, the higher the transparency, the clearer the infrared image taken by the application device of this embodiment. Please refer to Figure 1B for a black mask. The "black" of the black mask is made by mixing the two pigments in Figure A or the three pigments. The black color material made by mixing two kinds of transparent color materials or three kinds of transparent color materials in FIG. 1A is incorporated into an optical grade PC (Polycarbonate) polycarbonate resin plastic to form a black plastic. board. Optical grade polycarbonate resins and other resins that are transparent in industrial plastics include: PMMA (93% transparency), PC (transparency 88%), PS (transparency 89%), CR-39 (transparency 90%). , SAN resin (transparency 9%), MS resin (transparency 90%), poly-4-decylpentene-(TPX) (transparency > _). In addition, transparency such as polymethyl methacrylate, styrene copolymer (MAS), PET, PP and PVC is very good, only to find a compatible transparent color can also be applied as a black plastic plate. Substrate. The transparent resin must first have high transparency, and the surface quality requirements must be strict. Do not have any defects such as streaks, pores, whitening, halo, black spots, discoloration, and poor gloss. The purpose of the permeable and smooth surface is to allow the infrared paste to avoid or reduce scattering. The black plastic sheet is processed and cut into a black mask sheet 41 as shown in Fig. Black 15 M346031 _ , - In the winter color mask 41, a hollow hole 41a having a -_ shape is placed. L· a Supplement The black mask sheet 41 absorbs visible light (RGB primary color light). As shown in Figure 1, A does not absorb infrared. Therefore, the infrared light can pass through the black mask sheet 41. In order to make the black mask sheet 41 pass the infrared, the above two color materials, or the three color materials and the polycarbonate resin, etc., must be transparent, so that the infrared color is not caused because the colored color material and the resin It is affected by internal scattering.凊 Refer to Figure 2 for a schematic diagram of a conventional plate color camera with an infrared source. Spring Figure 2 shows the CCD color camera 21 module and the infrared light source module 22. As shown in FIG. 1, the CCD color camera module 21 includes a color camera 21a, a camera lens 21b, and a circuit control board 21c of a color camera 21. As shown in FIG. 2, the infrared light source module 22 includes a circuit control board 22a, a hollow hole 22b, 12 infrared light emitting diodes (LED) 22c, and a photosensitive diode (CDS) 22d. • Among them, 1^22〇 is named 〇1-520, epoxy resin packaging, the center wavelength is 95〇11111, the radiation angle is ±56 degrees, and the maximum power is i2〇mW. The size of the hollow hole 22b can be fitted into the camera lens 21b. A transparent blue glass substrate (Substrate) having a thickness of 2 mm is plated with dielectric coatings, and the interference effect of the dielectric film causes a wide-area incident light to be appropriately split into two optical paths. When incident light is incident on the transparent glass interface, a portion of the light penetrates through the glass interface and is reflected from the glass interface. In this embodiment, three samples of sample A, sample B, and sample C are prepared for the convenience of the test.

Peak 7 3· 2 7 修j| Years of 曰匕丨 无 无 I Reflectance percentage is M346031 mouth '% of transmittance is To / 〇 (Transmittance %), R% (Reflectance %) 〇 see Figure 2 Sample A is visible in the spectrum. As shown in Fig. 3, sample το/〇 is 7〇0/0. Please refer to Figure 3 for the sample Β visible spectrum. As shown in Figure 3, the sample is Τ. /. It is 60 〇 / 〇. Please refer to Figure 3B for the visible spectrum of sample C. As shown in Fig. 3, sample C has τ〇/❶ of 5〇%. The spectrum of Figure 3 to Figure 3 above is under the following conditions: (a) White light environment. (b) Frontal incident angle (twist). (c) The reference wavelength is 5 〇〇 nm. (d) Designed in a quarter-wave_stack multi_layered mode. (e) The ordinate is the percent transmittance. (1) The touch is the spectral wavelength (unit division). In the spectrum curves of Fig. 3 to Fig. 3B, there is a tendency to upturn in the long wave (infrared) portion, and the penetration of the film of these samples into the infrared is increased. The curve between the range of 4 〇〇 nm and 7 〇〇 nm in the visible light range is not complete—the uniform line generally has a higher refractive index, and the reflectance is larger. The refractive index n of different colors in the visible light part is changed from small to large in the case of positive dispersion (n〇_ldispersi(10)), but the variation range is small, and the variation range shown in the spectrum of Fig. 3 to Fig. 3 (4) is used for the photography of the device. Imaging quality has no effect. The film of the sample is a dielectric film, and its absorption is relatively small in the use of the photographic device, so the above samples can be recorded as: Incident light % == T% + R% For example 'sample AT% For 70%, the reflected light in the cyan glass is 3〇%. The dielectric _ of this embodiment is alternately vapor-deposited on a sun-driving glass sheet by three high and low refractive index (KMaterial) of titanium dioxide and dioxo. Dioxin (10)) has a refractive index η = 2.2 refractive index of the material. Dioxocutting 17 M346031 ^ 2 7 Repaired at _ _ 曰 / '/, (SiOO, refractive index η =1 · 54 is a low refractive index material. L_

Ti〇2 has a high refractive index (generally about n = 2.2~2·5), good mechanical strength, and is transparent in both visible and infrared regions. In the prior art, it is often used as a material for coating a multilayer film filter with Si〇2. Usually, the manufacturer of the electron smashing is pre-melted into a block and then vapor-deposited. The pre-melting current needs to be greater than the current during the evaporation, so that the film is not sprayed. If the heat resistance wire is used, it needs to be taken first.

TiO is evaporated as a starting material because the melting point of Ti0 is lower than that of Ti〇2 and Ti. If sputtering is used, • Take high-purity Ti as a dry material and apply it with oxygen. Taking electron retort plating as an example, it is generally considered that the control of oxygenation is important because Ti〇2 is prone to oxygen loss and produces different structures such as rutile. Therefore, in order to obtain a complete Ti〇2 film, experienced manufacturers have started with 丨3〇5. σ

Si〇2 is the lowest refractive index material with good film properties in oxide (generally refractive index is about η = 1.45~L47). Si〇2 is not easy to decompose, has small absorption and scattering, and has good transparency in the visible region. It is therefore the best and most commonly used low refractive index material required for multilayer films. Her melting point is very close to the evaporation point, so using granular Si〇2 as the starting material, the electron beam must scan the film quickly, otherwise the electron beam will quickly break the film into a deep hole and affect the evaporation. The rate is unevenly distributed with the evaporation of Si〇2 molecules. As with the use of a small number of layers, a dot-selection method can be used to evaporate electron beams. The spectrum of each sample shown in FIG. 3 to FIG. 3B is formed by alternately vapor-depositing two kinds of materials of high refractive index (Ti〇2) and low refractive index (Si〇2) on a transparent cyan glass plate. The optical thickness of each film (the refractive index of the film multiplied by the thickness of the film) is one quarter of the reference wavelength. M346031 As for the monitoring of film thickness, it is covered by the field of visible light. The sample is plated with five layers: First layer: ruthenium dioxide plated. Optical film thickness = 1.8000. Second layer: titanium dioxide plated. Optical film thickness = 0.4500. Third layer: ruthenium dioxide plated. Optical film thickness = 1.3000. Fourth layer: titanium dioxide plating. Optical film thickness = 1.1000 Fifth layer: ruthenium dioxide plated. Optical film thickness = 〇 · 9600 Sample B is also plated with five layers: First layer: ruthenium dioxide plated. Optical film thickness = 2.1000. Second layer: titanium dioxide plating. Optical film thickness = 〇. 9000. Third layer: ruthenium dioxide plated. Optical film thickness = 1.0500. Fourth layer: Titanium dioxide plated. Optical film thickness = 1 · 〇 5 〇〇 Fifth layer: ruthenium dioxide plated. Optical film thickness = 9000 Sample C is plated with seven layers: First layer: ruthenium dioxide plated. Optical film thickness = L 8000. Second layer: Titanium dioxide plated. Optical film thickness = 1. 6300. The third layer: mineral dioxide. Optical film thickness = 1. 1000. Fourth layer: titanium dioxide plating. Optical film thickness = 1. 0800 Fifth layer · · ruthenium dioxide plating. Optical film thickness = 1.1500 Sixth layer: Titanium dioxide plated. Optical film thickness = 0.5500 Layer 7: ruthenium dioxide plated. Optical film thickness = 1.5200 m 27 Correction of the year, μ, μ, no sample can be simple visual method 19 M346031 Listen. 3.2 7 correction date,,,,,,,,,,,,,,,,,,,,, The trajectory method achieves the expected reflectivity in a multi-layer quarter-wave film stack with a high refractive index and a high refractive index on a plate. In theory, it can also be proved that with the same number of layers, the quarter-wave film stack has higher reflectivity than the non-quarter-wave film stack. The more the number of layers, the greater the reflectivity. 0 Currently available coating materials have a high refractive index of 2.4 or less and a low refractive index of 1.35 or less in the visible light region, so the high reflection of a single quarter-wave film stack The width of the belt is limited. Therefore, in order to satisfy the present embodiment, it is possible to have a wide reflection band like a metal film in the visible light region, and it is necessary to widen the high-reflection band of the full dielectric film. One way to broaden is to have a regular increase in the thickness of each layer of the film system (depending on the number of steps or the number of steps) so that there is enough film at any wavelength in a wide area. The layer, whose optical thickness is also close enough to a quarter wave. However, the highly reflective area thus produced has many reduced ripples and must be optimized by optimization. Other methods include adding a quarter-wave film stack with a shorter center wavelength to the other quarter-wave stack. The design of the coating can basically be started from the standard film system. For example, high reflection mirrors are designed on the basis of a quarter-wave film stack, regardless of the width or single or double wave number. When the initial design fails to meet the optical performance of the demand, it is optimized or synthesized using current commercially designed computer software. Some optimizations use mathematical techniques and are constantly being improved. For example, the most commonly used are Simplex method, Least-square fit or damped least squares, and synthesis. The dielectric film of this embodiment is made of dioxic M346031 titanium oxide and cerium oxide which are transparent to both visible light and infrared light. The designed parameters of each film layer are then entrusted to the smelting of the blue glass of the spectrum of Figure 3 to Figure 3B. Please refer to Figure 4 for a schematic diagram of the device A for sample A. 4 includes a photographic lens 2ib, an LED light source 22c, a black mask 41, a coated cyan 42, a photographic device housing 43, a rear cover device 43a, a human body 44, a power pack 45, an image display 46, and A representative light of an infrared LED L1 emitted by an LED, a visible light L2 incident on a human body, and a light L3 viewed by a human eye. The black mask 41 and the coated cyan 42 in the figure constitute a double shield 40. A human body 44 is stood in the first corner of the laboratory, and the human body 44 illumination is measured by illumination. 360LUX 〇 A human body 44 is stood in the second corner of the laboratory, and the illumination of the human body 44 is measured by illumination to be 40 lux. In the first corner of the laboratory, when the eye of the human body 44 looks at the light beam L3 facing the front end of the shield, L3 is reflected by the high reflection mirror surface L3a on the front surface of the coated cyan glass 42, so that the object in the casing of the photographic device 43 is not visible ( For example, the camera lens 21b and the infrared light source 22c). The incident visible light L2 of the human body 44 can pass through the coated cyan 42 and then enter the camera lens 21b via the hollow holes 41& of the black mask 41 to open the image display 46 to view the color (visible light) image of the human body 44. When the power is turned off in the first corner of the laboratory, the illumination is changed from 360 LUX to 〇 LUX (or when the ambient light is insufficient for photographic imaging), a photosensitive diode (CDS) 22d is activated by the LED light source 22c, and after the LED light source 22c is activated. Emits a 950nm infrared light L1, infrared light L1 is irradiated to the human body 44 and then reflected through the coated blue glass 42 and then into the camera lens 21b, 21 M346031 correction. Fill-free image display 46 can see the human body 44 black and white (infrared light) image. When the energy of the infrared light L1 is insufficient (the human body 44 is slightly away from the LED light source 22c), the black and white (infrared light) image seen on the image display unit 46 has a snowflake spot. Commercially available products of different sizes are equipped with a large-size light source 22c for use in environments with different illuminances. When the sensitivity adjustment level of the photosensitive diode (CDS) 22d does not match the image sensitivity of the ambient light to the color camera (for example, the ambient illumination is sufficient for the color image of the color camera), but the photosensitive diode (CDS) The 22d sensitivity adjustment level is adjusted to an insufficient level. 'Sometimes a color (visible light) image is seen, and a color image of the object closest to the camera lens 21b is also seen on the image display 46. There is a block-like strong white light image, which is caused by the infrared light L1 emitted by the LE:D light source 22c. Generally, the display quality of the image will not have much influence. If the human body 44 is slightly farther from the device, the surface of the coated cyan 42 is seen to be black, mainly because the incident light of the environment is 70% incident on the coated cyan 42 and the black mask 41 adhered by the cyan glass 42 is applied. Absorption and scattering, under the black underlayer of the black mask sheet 41, exhibits a light dark reflection. Therefore, the entire shield appears as a light dark reflective shield. After the incident light of the environment is incident on the coated cyan 42 , if there is no black mask 41 on the bottom, if the human eye is in the close distance from the coated cyan 42 , the light L3 can directly penetrate the coated cyan 42 into the housing of the photographing device. Within the 43, the human eye can faintly see the camera 21 and the LED light source 22c in the housing 43 of the photographing device. Therefore, the black mask sheet 41 effectively blocks incident visible light (as shown in FIG. 1).

M346031 has hidden effects. When the eye gaze L3 of the human body 44 in the second corner of the laboratory is facing the front end of the shield, objects in the housing 43 of the photographing device (for example, the camera 21 and the infrared light source 22c) are not seen. However, the entire shield presents a more dark reflective shield. However, the image of the human body 44 seen by the image display 46 in the second corner of the laboratory is a black and white infrared image. Because the ambient incident light 40LUX only has 28 LUX (40 LUX*0·7) left, the general imaging minimum illuminance 1 Lux (the minimum illuminance definition of each manufacturer's product on the market is different), as long as the ambient illuminance is at a minimum. About ten times (10 Lux) of illuminance 1 Lux can also be used to capture "acceptable" color images. However, since the photosensitive diode (CDS) 22d has been activated by the light source 22c due to the low illumination, the infrared image covers the color image, so the image of the human body 44 seen by the image display 46 is mostly black and white. Infrared image. The results of the test of sample B and sample c in the first corner of the laboratory were found; sample A, sample B, sample C, and the image of human body 44 seen on image display 46 were all 瘫 color images. ^ The results of the test of sample B and sample C in the second corner of the laboratory were found; the original sample A and sample B, sample c, and the human body image seen on the image display 46 were black and white images. Samples with a n-rate of 50% to 70% have more _ and == for the same color. However, the color portion of the entire protective leather (plated green paste) is not the same, and the lower the reflectance, the darker (like black) color. For sample A, sample B, and sample c, they are all imageable day and night, and are colored in the daytime.

: Amendment I

The M346031 is black and white at night. Since it is the same day and night, it can be imaged. It is not meaningful to distinguish the sample from A or B or C in the same environment. However, the color exhibited by the entire protective cover (coated cyan 42) has some degree of significance in terms of the use environment. In the actual application environment, the color of the entire protective cover is dark and dark (like black), which is not easy to meet the needs of the environment. To change the color of the protective cover (coated cyan 42), design it in a direction where the reflectance is high. In this embodiment, a sample D is separately prepared, which has a high reflectance of 80%. What is the effect? See Figure 5 for the visible spectrum of sample D. Figure 5 differs from other Figure 3, Figure 3A, and Figure 3B in that the ordinate is indicated as the percentage of "reflectance" and the reference wavelength is 510 nm. The film design is plated with thirteen layers: First layer: ruthenium dioxide plated. Optical film thickness = 2.5000. Second layer: Titanium dioxide plated. Optical film thickness = 〇 · 8000. w Third layer: ruthenium dioxide plated. Optical film thickness: = 0.7500. Fourth layer: titanium dioxide plating. Optical film thickness = 〇 · 7000 Fifth layer · · ruthenium dioxide plating. Optical film thickness = 0.9000 Sixth layer · Titanium dioxide plating. Optical film thickness = 0.9600 Seventh layer: ruthenium dioxide plated. Optical film thickness = 1.1000 Eighth layer: Titanium dioxide plated. Optical film thickness = 1.1500. Ninth layer: ruthenium dioxide plated. Optical film thickness = 1.2500. Tenth layer: titanium dioxide plated. Optical film thickness = 1. 2000 24

M346031 The eleventh layer: ruthenium dioxide plated. Optical film thickness = 1.3000 Twelfth: Titanium dioxide plating. Optical film thickness = 1. 3000 Thirteenth layer · · ruthenium dioxide plated. Optical film thickness = 0.6300 The color of the sample D (the key film cyan 42) in the first corner of the laboratory is all bright and specular. If it is compared with sample A, sample B, and sample c, the protective cover (coated blue glass 42) of sample D is a bright mirror, which is like a real mirror mirror. The protective cover (key film cyan 42) of sample A, sample B, and sample C are colored dark, dark, dark (black-like), respectively, unlike mirrors with a mirror. Therefore, if the color of the protective cover is a bright mirror, the sample D is used, that is, the transmittance of the coated cyan 42 is 20%, and the preferred transmittance is 1% to 3%. The pattern of sample A, sample b, ® sample C is used if the color of the protective cover is black and bright. That is, the coated transparent glass 42 preferably has a transmittance of 30% to 70%. The photographing device housing 43 is an aluminum outer casing. Mainly metal aluminum performs relatively fast heat dissipation on the heat generated by the LED light source 22c. The photographing device housing 43 is an aluminum outer casing. Mainly metal aluminum performs relatively fast heat dissipation on the heat generated by the LED light source 22c. Moreover, the aluminum outer casing is easy to process and the quality is relatively lighter than iron. The base of the photographing device housing 43 may be provided with a base for supporting and locking the color camera module 21 and the infrared LED module 22 with screws. The camera lens 21b shall be repaired with a coated cyan glass 42 toward 25 M346031 27 as shown in FIG. And the camera lens 2ib should be inserted as far as possible into the hollow hole 41a of the sheet 41 as shown in FIG. If there is still enough space in the hollow hole 41a, it should be noted that the infrared light emitted from the LED light source 22c is reflected to the surface of the lens blue glass 42 and then enters the camera lens 21b, paying particular attention to other unnecessary leakage from the outer casing 43 of the photographing device. The stray light or the like causes multiple reflections and then enters the camera lens 21b. The photographing device housing 43 can be provided with an openable rear cover unit 43a for easy installation and replacement of the color camera module 21 and the infrared LED module 22. The test of this embodiment knows that the selected single LED light source 22c emits an infrared angle as much as possible. It is not suitable to adopt a special specification product of 90 degrees or more. When the infrared LED is turned on for a long time, attention should be paid to the heat dissipation problem. The preferred method is to keep the distance from the surface of the black mask 41 as much as possible when the LED light source 22c is placed, and the material of the black mask 41 is changed to a temperature-resistant PC. (The temperature is about 120 degrees C or glass). Especially when a large number of LED light sources 22c are used in a large-scale installation, a heat-dissipating fan or other heat-dissipating device can be added. A plane of the photographing device housing 43 is provided with a threaded recess for inserting or locking components such as the coated cyan 42 and the black mask 41. The coating of the coated cyan 42 faces the inside of the photographic device casing 43, and the film surface is prevented from being easily scratched.

The power supply unit 45 provides the color camera 21, and the LE:D light source 22c is usually powered by DC12V and the power of the image display unit 46 is usually AC110~240V of the city. Please refer to Figure 6 for the relationship between film reflectance and optical thickness. It can be seen from the optical film interference phenomenon that when the light is perpendicularly incident on the single layer film, and the optical thickness Μ (which is the product of the film reflectance and the film thickness) is (2 〇 /2), 〇, (3; 1 〇 /2) )···, the film's reflection intensity against the wavelength is constant; if the optical thickness Μ is (λ〇/4), (3λ〇/4), 26 M346031 \ ^\3*月27日修正-(广4) ":, the reflectance will be a maximum or minimum value, and its value depends on whether the film 疋 is larger or smaller than the refractive index of the substrate (1) When n >, the reflectance is the maximum value, when ^ < m, The reflectivity is a minimum, as shown in Figure 6. It can be seen from the above that the optical thickness of the layer is an odd-odd times of the wavelength of the incident light, and the destructive interference is formed by the anti-neutral, and the anti-reflection effect with a reflectance of 0 can be obtained. However, the reflectance for other wavelengths is not G. Therefore, in order to obtain a wide reflectance in the visible wire circumference, it is usually a 彡 layer structure, and the appropriate reflectance can be obtained by selecting the refractive index of the film layer and the film design. Therefore, the coated glass sheet 42 is a multilayer film structure. In summary, the decorative cover device of the surveillance camera of the present invention is suitable for surveillance photography. Its protective cover comprises two layers, the inner layer is a black mask piece 41 and the outer layer is a coated glass piece 42. Moreover, the black mask sheet 41 is under the coated glass sheet 42 so that the shield is black. The transmittance of the coated glass sheet 42 is 20%, and the preferred transmittance is between 20% and 50%. > A hollow hole 41a is formed in the black mask piece 41 mainly to allow visible light to pass through to the photographic lens 21b. Although the black mask sheet 41 is under the coated glass sheet 42, the shield is black. However, if it is observed close to the coated glass sheet 42 at a certain angle, the slight reflection of the glass lens on the photographic lens 21b in the hollow hole 41a of the black mask sheet 41 can be seen faintly.

In general, the reflective L3 that causes reflection on the coated glass 42 is under the black mask 41, so that the person in front of the shield does not easily see the camera 21 and the LED 27 in the shield. M346031 Correction Supplement ί Light source 22c So reach the hidden decorative effect. In fact, the reflectance caused by the glass frit 42 is a mirror effect of 5.軎鈇r into a "mirror" Reflectivity is very good, the higher the reflectivity, the better the mirror effect of the "mirror", / too low 'protective cover approaching the forest color camera, the reflectivity is too high, color camera image The image quality of the Image Sensor is poor. If the focus is on the mirror effect of the "mirror" of the shield, increase the reflectivity and reduce the transmittance. As for the consequences of poor image quality after lowering the transmittance, it is possible to compensate for the improvement of "quality deterioration" in a sufficient environment (for example, a high-brightness environment in a hypermarket) or by adding an auxiliary light source. The purpose of this creation is "mirror mirror effect that takes care of the shield".

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M346031 [Simple description of the diagram] Figure 1 is the primary color map of the color light. Figure 1A shows the three primary colors of the color material. Figure 1B is a schematic view of a black mask. Figure 2 is a schematic view of a conventional plate color camera with an infrared light source. Figure 3 is a visible spectrum of sample A. Figure 3A is a visible spectrum of sample B. > Figure 3B is a visible spectrum of sample C. Figure 4 is a schematic view of the apparatus A for sample A. Figure 5 is a visible spectrum of sample D. Figure 6 is a graph showing the relationship between the reflectance of the film and the optical thickness.

29 M346031 [Description of main component symbols] λ 0 light wavelength LI LED emitted infrared L2 human incident visible light L3 human eye gaze light visible light L3a reflected light Μ optical thickness | η film refractive index m substrate refractive index Τ % transmittance percentage R reflectivity R% reflectance percentage 21 CCD color camera module 21a camera lens. 21b CCD circuit control board 22 infrared light source module 22a circuit control board 22c infrared light emitting diode LED 22d photosensitive diode 40 double protective cover 41 Black mask piece 41a hollow hole

M346031 42 coated cyan glass 43 photographic device housing 43a back cover device 44 human body 45 power supply unit 46 image display

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Claims (1)

M346031 Month. a special; v IX, the scope of application for patents: 1. The double-layer protective cover device for surveillance photography, suitable for photography, includes at least: Second, the outer layer is a transparent glass plate coated with a multilayer dielectric film; The inner layer is a black hole that can block visible light and can transmit infrared light. The black mask has a hollow hole; and the inner layer is bottomed on the outer layer, and the incident light is incident on the outer layer first—partially on the outer surface The reflection 'the other part transmits the outer layer and then passes through the hollow hole in the inner layer. 2. A double-layered guard device for surveillance photography according to the first aspect of the invention, characterized in that the outer layer has a visible light transmittance of between 2% and 70%. 3. A double-layer shield device for monitoring photography according to the first aspect of the invention, characterized in that the film plated on the outer layer is a dioxide dioxide and titanium dioxide. 4. A double-layer shield device for surveillance photography according to claim 1, wherein the inner layer is made of two kinds of transparent color materials or three kinds of transparent color materials, which are mixed with transparent resin and then ejected. forming. 5. A double-layer shield device for surveillance photography according to claim 1, wherein the outer layer and the inner layer are overlapped and placed together in a housing of the photographing device, wherein the outer layer faces the housing of the photographing device The exterior of the photographic device housing is provided with a color camera module and an infrared light source module, wherein the color camera lens passes through a hollow hole in the inner layer toward the outer layer, and the infrared light source module emits infrared light in a direction The inner layer faces the outer layer. Make up ‘ 32