The present disclosure relates to a reflective inner red dot sight optical system with improved monochromaticity and concealment, two-light three-color optical system, and a sight thereof.
The light emitted by the LED chip installed on the existing gun sight is reflected by the cemented lens to form an aiming spot, the light-emitting wave band of the LED chip is 560±80 nm or other wavebands, and the light emitted from the LED often contains red, yellow, green and other colors, this multi-color light is reflected by the narrow-band interference filter film and the long-wavelength cutoff filter film plated on the cemented lens, the light with a wavelength of 545+15 nm and greater than 600 nm is reflected into the human eye, when the human eye observes the sight, there will be multiple target images with overlapping colors (multi-wavelength light projecting target images of different colors), which affects the clarity of the target, causes aiming errors, and reduces shooting accuracy. At the same time, looking at the cemented lens from a long distance, the band energy emitted by the LED chip is very strong, which is easy to be detected by human, exposes the target, and reduces the concealment of the sight.
The existing inner red dot sights have single light, two-light or three-light (multiple-light), however, the realization of the three-color function requires a corresponding number of LED chips or light-emitting units or light-emitting modules, which results in high power consumption, unswitchable graphics, complex installation structure, high debugging and maintenance costs, and the size of the sight will also increase. As a result, the carrying weight and volume have increased to varying degrees, making it inportability.
The first purpose of the present disclosure is to overcome the problem that there are two or more colors of target images reflected by the lens or lens group or cemented lens into the human eye because the existing sighting device has a wide light-emitting band of the LED chip, and the problem that the light emitted from the lens or the lens group or the cemented lens is too strong, leading to reduced concealment. The second purpose is to overcome the problems of complex structure, large weight and volume of the existing multi-beam sights and the cost is high and inportability.
To achieve the above purposes, the present disclosure provides a reflective inner red dot sight optical system with improved monochromaticity and concealment, the optical system includes an LED chip and a lens for reflecting light emitted from the LED chip, a filter plated with a narrow-band interference filter film is provided near the LED chip and located between the LED chip and the lens; the filter (2) is used to filter out light of a wider waveband except the center wavelength emitted from the LED chip (1), which improves a monochromaticity of light waves entering a human eye, a light energy of the light except the center wavelength emitted from the filter (2) is weakened or cut off, a light energy of the center wavelength emitted from the filter (2) shines on a cemented reflective surface of the lens (3), the cemented reflective surface is plated with a cutoff film that cuts off the center wavelength, looking at the lens (3) from a long distance, the light emitted from the lens (3) is not easy to be found, which improves the concealment of the sight.
In order to overcome the problems of complex structure, large weight and volume of the existing multi-light sights and the cost is high and inportability, the present disclosure provides a two-light three-color optical system which includes a green light chip module, a red light chip module and a right-angle prism.
The green light chip module and the red light chip module are arranged perpendicular to each other.
The geometric center of the right-angle prism is set at an intersection of the light emitted from the green light chip module and the red light chip module.
The diagonal surface of the right-angle prism extends along the angle bisector of the angle between the light emitted from green light chip module and the red light chip module, and the side of the diagonal surface facing the red light chip module is plated with a red light total reflection film, the side of the diagonal surface facing the green chip module is plated with a green light transmission film.
The cube prism is glued together by two isosceles right-angle prisms, and the diagonal surface is a cemented surface, one side of the cemented surface is plated with the red light total reflection film; after being totally reflected by the cemented surface, the green light transmission film is plated along the other surface of the cemented surface.
A sight including the above described two-light three-color optical system includes an LED mounting base installed at the back of a body, the green light chip module is installed on a front end surface of the LED mounting base, and the red light chip module is installed on a front end side of the LED mounting base through an LED base; an installation plane of the LED base is perpendicular to the front end surface of the LED mounting base.
A two-light three-color optical system includes a green light chip module, a red light chip module, a cube prism and a cemented lens.
The green light chip module and the red light chip module are arranged perpendicular to each other.
The geometric center of the cube prism is arranged at an intersection of the light emitted from the green light chip module and the red light chip module.
The cemented lens is arranged on the exit light path of the cubic prism.
The cemented lens is composed of a positive lens and a negative lens, the positive lens and the negative lens are arranged in the order of distance from the cube prism from far to near; the negative lens is plated with a narrow-band interference filter film with a center wavelength of 545±15 nm and a long-wavelength cutoff filter film with a wavelength greater than 600 nm.
The diagonal surface of the cube prism extending along an angle bisector of an angle between the light emitted from green light chip module and the red light chip module is plated with a composite film, the composite film is used to totally reflect an emitted red light of the red light chip module and transmit an emitted green light of the green light chip module.
The cube prism is formed by gluing two isosceles right-angle prisms, the diagonal surface is a cemented surface; the surface A, surface B, and surface C of the cube prism are all plated with an anti-reflection film with different wavelength of the light.
The surface A is two adjacent surfaces that are perpendicular to each other, and are respectively light incident surfaces of the green light chip module and the red light chip module.
The surface B is a light exit surface after the light emitted by the green light chip module and the red light chip module passes through the diagonal surface.
A sight including the two-light three-color optical system includes an LED mounting base installed at the back of a body, the green light chip module is installed on a front end surface of the LED mounting base, and the red light chip module is installed on a front end side of the LED mounting base through an LED base; the installation plane of the LED base is perpendicular to the front end surface of the LED mounting base.
The advantages of the present disclosure are as follows: the monochromaticity of the light emitted by the LED chip that enters the human eye is improved, the light energy emitted from the lens is reduced, and is not easy to be found, and the concealment of the sight is improved; By setting two red and green light sources that emit light perpendicular to each other, with the help of a prism and a total reflection film or a transmission film, the generation of green light, red light or yellow light can be realized by controlling the circuit, which greatly reduces the number of light sources and the volume and weight of the sight. By setting two red and green light sources that emit light perpendicular to each other, with the help of a prism and a total reflection film or a transmission film, the generation of green light, red light or yellow light can be realized through the control circuit, which greatly reduces the number of light sources and the volume and weight of the sight.
The present disclosure will be described in detail below in conjunction with the drawings and embodiments.
Explanation of reference symbols of accompanying drawings are as follows: 1. LED chip; 2. filter; 3. lens; 4. green light chip module; 5. red light chip module; 6. cube prism; 7. LED mounting base; 8. diagonal face; 9. LED base; 10. slider; 11. body; 12. 13. light source; 14. cemented lens.
In order to overcome the problem that there are two or more colors of target images reflected by the lens or lens group or cemented lens into the human eye because the existing sighting device has a wide light-emitting band of the LED chip, and the problem that the light emitted from the lens or the lens group or the cemented lens is too strong, leading to reduced concealment. Specifically, in the past, light was only filtered through the reflective film of the lens, but this filtering method has a problem that the efficiency of entering the human eye after external light passes through the lens is reduced, on the one hand, if the high efficiency of human eyes observing the external light is ensured, it will result in part of the light energy filtered out of the LED will be unclean; on the other hand, if it can ben filtered out, the light passing part will lose color more seriously (the human eye will look blue or red when observing the outside through the lens), and the light passing efficiency will decrease, which will affect the human eye's observation of the outside world.
This embodiment provides a reflective inner red dot sight optical system shown in
The closer the filter is disposed to the LED chip, the greater the light-emitting angle of the light entering the filter, the more wavebands are filtered out, and the narrower the wavebands entering the cemented lens (lens), from the A direction, the human eye sees the light emitted from the LED light-emitting chip is in a narrower band. In this embodiment, the distance between the LED chip 1 and the filter 2 is preferably in the range of 0 to 4 mm, the closer the filter 2 is to the LED light-emitting chip, the better the effect, such as 2 mm, 1.5 mm, 1 mm, or 0.5 mm or 0.2 mm, and even adhere to the surface of the LED chip by optical bonding.
The principle and effect of adding the filter 2 can be described in detail with reference to
Refer to
Without filter 2, the light of the 560±80 nm wavelength band emitted by the LED chip is incident on the cemented lens (lens), the wavelength range is wider, and the monochromaticity is reduced, since the light energy emitted from the lens is not filtered by more optical components, the spectrum of the emitted light is wider and the energy is stronger, and it is easy to be found by people looking from the direction B shown in
It should be particularly noted that the wavelength range involved in the present disclosure is not limited to the above example wavelengths, and may also be other wavelengths.
In order to understand the above embodiments more intuitively and better, this embodiment provides two different sights as shown in
In order to overcome the problems of complex structure, large weight and volume of the existing multi-beam sights and the cost is high and inportability, this embodiment provides a two-light three-color optical system shown in
As shown in
In order to generate the third color light, this embodiment provides the sight shown in
So far, it has been realized to generate multiple colored lights with the least light source, thereby reducing the complexity and maintenance cost of the sight.
Referring to
The specific light path is: the cube prism 6 is glued together by a isosceles right-angle prism I and a isosceles right-angle prism II, the light source 12, that is, the red light chip module 5 emits light with a center wavelength of λ0=658 nm, this light is incident from the surface C of the isosceles right-angle prism I, reflected by the cemented surface of the isosceles right-angle prisms I and II, and then emitted from the surface B of the isosceles right-angle prism I, the direction of the light changes by 90°, The cemented surface is plated with a film that reflects light greater than 600 nm as shown in
The light source 13 that is the green light chip module 4 emits light with a center wavelength of λ0=545 nm, this light is incident from the surface A of the isosceles right-angle prism II, which is plated with a narrow-band transmission film that can transmit 545 nm±15 nm wavelength as shown in
In the above described embodiment, the cemented lens 14 is composed of positive and negative lens, the positive and negative lens are arranged in the order of distance from the cube prism 6 from far to near; the negative lens is plated with a narrow-band interference filter film with a center wavelength of 545+15 nm and a long-wavelength cutoff filter film with a wavelength greater than 600 nm. Therefore, when the light emitted by the red and green light chip modules is incident on the reflective surface of the cemented lens 14, that is, the negative lens. The negative lens is plated with a narrow-band interference filter film and a long-wavelength cutoff filter film as shown in the graph of the
Number | Date | Country | Kind |
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201910028904.8 | Jan 2019 | CN | national |
Filing Document | Filing Date | Country | Kind |
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PCT/CN2019/130414 | 12/31/2019 | WO | 00 |