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Device and method for measuring focal length, rear cut-off distance and resolution of non-coaxial optical system

A technology of optical system and identification rate, which is applied in the direction of measuring devices, testing optical performance, optical instrument testing, etc., can solve the problems of untrue and wrong measurement results, achieve accurate and reliable measurement data, improve economic benefits, and improve work efficiency Effect

Pending Publication Date: 2017-08-11
XIAN NORTH ELECTRO OPTIC TECH DEFENSE
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  • Abstract
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  • Application Information

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Problems solved by technology

The measurement results are even more untrue and erroneous

Method used

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  • Device and method for measuring focal length, rear cut-off distance and resolution of non-coaxial optical system
  • Device and method for measuring focal length, rear cut-off distance and resolution of non-coaxial optical system
  • Device and method for measuring focal length, rear cut-off distance and resolution of non-coaxial optical system

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Embodiment Construction

[0042] Such as figure 1As shown, a device for measuring the focal length, back intercept and discrimination rate of an incoaxial optical system includes at least a light source 1, a collimator 2, a curved mirror 3, an off-axis lens assembly 4, and a measuring microscope 5. The light source 1 is parallel to At the front end of the light pipe, there is a Poirot plate 7 or a discrimination plate 10 at the focal plane of the objective lens between the light source and the collimator to provide the object-side image surface, and the curved mirror is on the exit side of the collimator, and the object-side image irradiated by the light source Parallel light beams exit through the collimator, are received by the curved mirror, pass through the off-axis lens assembly 4 and enter the measuring microscope 5 on the imaging plane of the image side, and use the eyepiece 502 of the measuring microscope 5 for reading and measurement.

[0043] The non-coaxial optical system 6 is composed of th...

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Abstract

The invention relates to a device and a method for measuring focal length, rear cut-off distance and resolution of a non-coaxial optical system. The device at least comprises a light source, a parallel light tube, a curved mirror, an off-axis lens assembly and a measuring microscope. The light source is arranged at the front end of the parallel light tube. The focal plane of an objective lens between the light source and the parallel light tube is provided with a Porro board or a resolution board for supplying an object image plane. The curved mirror is arranged at the outlet side of the parallel light tube. The object image plane which is radiated by the light source emits a parallel light beam through the parallel light tube. The parallel light beam is received by the curved mirror. The parallel light beam enters the measuring microscope for the object image plane through the off-axis lens assembly. The measuring microscope is utilized for reading numbers and measuring. The device and the method can improve quality in measuring the focal length, the rear cut-off distance and the resolution of the non-coaxial optical system. Furthermore the device and the method can improve adjusting efficiency and reduce labor intensity of adjusting personnel.

Description

technical field [0001] The invention belongs to optical system measurement, and relates to a device and method for measuring the focal length, back intercept and discrimination rate of a non-coaxial optical system. Background technique [0002] The characteristic parameters of the optical system are used as the basis for the design of optical instruments, and the technical characteristic requirements are put forward according to the use requirements, thus determining the scope of application of the optical system. Measuring the characteristic parameters of the optical system is not only a quantitative index for product acceptance, a means of assessing whether it meets the design requirements, but also a means of discovering defects and problems in the entire process from design, processing to assembly. [0003] The optical system is composed of several optical lenses. After the optical lenses are processed and assembled, due to the existence of processing and assembly errors...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M11/02
CPCG01M11/02G01M11/0214
Inventor 闫博赵逢元纪茹刘立新陈兆军张小玲王波
Owner XIAN NORTH ELECTRO OPTIC TECH DEFENSE
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