Prism-surface-reflection-based variable-zoom dimming apparatus

A surface reflection and light reduction device technology, applied in the field of optical instruments, can solve the problems of difficult realization of variable light reduction, lower resolution, easy oxidation, etc., and achieve the effect of good application prospects, high resolution, and few optical surfaces

Active Publication Date: 2017-04-26
初景文化传媒(肇庆市)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the light reduction of the aperture will reduce the aperture of the light and reduce the resolution; the neutral gray filter and the polarizer have serious color cast problems when the light is reduced by a high magnification, and will also reduce the resolution; the narrow-band filter can only pass through a specific wavelength The information of other wavelengths is lost during dimming; the Bard film is a soft film, which is easy to oxidize and damage, and it will reduce the resolution when it is uneven; the Herschel prism uses the surface reflection of a single wedge prism to achieve dimming , but the dimming factor of a single wedge prism is only about 50 times, and a neutral gray filter is needed to achieve a higher dimming factor. There are also defects such as neutral gray filter reducing resolution and color cast.
In addition, the above-mentioned methods are not easy to achieve large-scale zoom dimming

Method used

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Examples

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Effect test

Embodiment 1

[0032] Embodiment 1: The variable magnification dimming device of the present invention is used for solar observation

[0033] In this embodiment, the optical path is as Figure 4 As shown, the sunlight is converged by the Jindu F-600 telescope (caliber 60mm, focal length 600mm), enters from the incident interface, and is steered at right angles through the present invention to exit from the zenith interface, and the dimming factor is 125,000 times. The zenith interface is connected to the 12mm eyepiece and the iPhone 5s mobile phone for photography behind the eyepiece. Such as Figure 5 As shown, the sun is correctly exposed and has good resolution through high-power dimming, and the two sunspots on the left of the center and the lower right corner are clearly visible. It can be seen that the present invention is applicable to solar observation.

Embodiment 2

[0034] Embodiment 2: The variable magnification light reduction device of the present invention is used for laser observation

[0035] In this embodiment, a 200mW laser torch is used as the light source (laser wavelength is 532nm), and its focusing lens is adjusted to make parallel light. At this time, the diameter of the laser speckle is about 1.6mm. Optical path such as image 3 As shown in b, the rotating prism adjusts the dimming factor to 125,000 times. The laser beam is vertically injected into the entrance interface of the present invention, and the laser speckle is photographed from the exit interface with a Canon A720is camera. Such as Figure 6 As shown, the morphology of the laser speckle is clearly visible. It can be seen that the present invention is suitable for laser observation.

Embodiment 3

[0036] Embodiment 3: The variable magnification dimming device of the present invention is used for red-hot filament observation

[0037] The present embodiment adopts the Opple 250W infrared heating bulb as the light source. Optical path such as image 3As shown in c, the rotating prism adjusts the dimming factor to 2,500 times. The light is injected from the incident interface, and the filament is photographed from the exit interface with a Canon A720is camera. Such as Figure 7 As shown, the shape of the glowing filament is clearly visible through high-power dimming. It can be seen that the present invention is applicable to the observation of burning hot metals.

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Abstract

The invention relates to a prism-surface-reflection-based variable-zoom dimming apparatus comprising four rectangular prisms including the first prism, the second prism, the third prism and the fourth prism. The four rectangular prisms arranged in a housing in a shape like a Chinese character "tian". An incident port is formed at one end of the housing and an emergent port is formed at the other opposite end of the housing; and a zenith port is formed in the top of the housing. The four rectangular prisms can rotate around the midpoint of the bevel edge in the housing and can be localized by clamp groove units; and an included angle of 0 degree, 90 degrees, 180 degrees, or 270 degrees is formed between one right-angle side of each prism and the bottom side of the housing to switch a surface reflection state and an internal reflection state and a reflection direction. The dimming apparatus having advantages of high dimming magnification, high dimming magnification adjustability, flexible light outgoing way, a few of optical surfaces in a light path, high resolution ratio, simple structure, low cost, high material availability, simple operation has the broad application prospects.

Description

technical field [0001] The invention belongs to the technical field of optical instruments, and relates to a variable magnification light reduction device based on prism surface reflection. Background technique [0002] Production, life and scientific research often need to observe high-brightness objects such as the sun, laser beams, electric arcs, plasmas, and molten metals. Such objects have extremely high luminous intensity, far exceeding the response range of the naked eye or ordinary photosensitive elements. If proper light reduction measures are not taken, not only will it be impossible to observe the details of the object due to overexposure, but it will also easily cause retinal burns or damage to the photosensitive element. [0003] The existing light reduction measures mainly include aperture light reduction, neutral gray filter light reduction, polarizer light reduction, narrow-band filter light reduction, Bard film light reduction, Herschel prism light reductio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B17/04G02B7/18
CPCG02B7/1805G02B17/04
Inventor 姚夙汪洪武韦寿莲严子军
Owner 初景文化传媒(肇庆市)有限公司
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