Method for improving focal distance detection precision of long focal distance collimator
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
- Publication Date
- 2010-10-06
- Estimated Expiration
- Not applicable · inactive patent
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Abstract
Description
technical field
[0001] The invention belongs to the technical field of optical detection, and relates to a method for improving the detection accuracy of the focal length of a collimator with a long focal length. Background technique
[0002] The focal length is an important parameter to determine the relationship between the object and the image of the optical system. It can determine the position, size, upside down, virtual reality and other characteristics of the object imaged by the optical system. The focal length value of the optical system should be measured before use. The commonly used methods are the magnification method, the additional lens method, the additional receiver method and the precision angle measurement method. The long focal length collimator is a kind of optical system, and the common method for detecting the focal length of the long focal length collimator is the precision angle measurement method. The closest existing technology to the present inve...