Method and device for testing stray light
A stray light and light source technology, which is applied in the field of stray light testing and evaluation, can solve the problems of reduced contrast, inability to specifically obtain the position and size of stray light effects, and achieve the effect of improving accuracy
Active Publication Date: 2022-03-01
WUHAN JINGLI ELECTRONICS TECH +1
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Problems solved by technology
[0003] For the stray light of the imaging system, it can generally be called ghost image or glare. The reason for them is that the light reflected by the lens surface is scattered in the lens barrel and the light inside the camera. These reflected lights cover the picture. reduce the contrast
Although this glare can be effectively reduced by using advanced coated lenses or by using hoods, it is still necessary to test stray light and analyze their impact
[0004] The current stray light test system mainly uses a collimator and an integrating sphere or two integrating spheres for testing. The collimator or the front integrating sphere provides uniform illumination, and the rear integrating sphere provides the background (to ensure black). Illumination changes before and after the system can draw conclusions about the existence of stray light and its severity, but the current test method cannot specifically obtain the impact position and size of stray light
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[0051] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.
[0052] The flow charts shown in the drawings are just illustrations, and do not necessarily include all contents and operations / steps, nor must they be performed in the order described. For example, some operations / steps can be decomposed, combined or partly combined, so the actual order of execution may be changed according to the actual situation.
[0053] see figure 1 As shown, the embodiment of the present invention provides a method for testing stray light, a...
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The invention discloses a stray light testing method and device, and relates to the field of stray light testing and evaluating, and the method comprises the following steps: obtaining the influence of stray light generated by each local light-emitting region at a set position on the full-view brightness of a to-be-tested imaging system; according to the influence of the stray light generated by all the local light-emitting areas on the full-view brightness, the influence position and size of the stray light on the to-be-detected imaging system are obtained. According to the stray light testing method, the stray light influence can be positioned and quantitatively analyzed.
Description
technical field [0001] The invention relates to the field of test and evaluation of stray light, in particular to a method and device for testing stray light. Background technique [0002] In the optical system, for the imaging optical system, any undesired light that reaches the detector surface after propagation is stray light; for the non-imaging optical system, any imaging or other unintended light spots formed by the propagation of light are stray light. [0003] For the stray light of the imaging system, it can generally be called ghost image or glare. The reason for them is that the light reflected by the lens surface is scattered in the lens barrel and the light inside the camera. These reflected lights cover the picture. reduce the contrast. Although this glare can be effectively reduced by using advanced coated lenses or by using hoods, it is still necessary to test stray light and analyze their impact. [0004] The current stray light test system mainly uses a c...
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Login to View More IPC IPC(8): G01M11/02
CPCG01M11/02
Inventor 洪志坤宁谦郑增强欧昌东刘荣华
Owner WUHAN JINGLI ELECTRONICS TECH