Optical system capable of shortening optical path and lens imaging quality detection system

Abstract

The invention discloses an optical path shortening optical system and lens imaging quality detecting system, which is characterized by the following: shortening optical path between object and imaging lens through adding one equivalent lens; satisfying different positions of imaging lens; mating the same size object to adjust gap of equivalent lens and imaging lens.

Description

technical field [0001] The invention relates to an optical system, in particular to an optical system capable of shortening the optical path and a lens imaging quality detection system. Background technique [0002] see figure 1 , shows the structural diagram of a known optical system for lens imaging quality testing. The most commonly used testing method for lens imaging quality is to use a standardized sample 100 as an object to be viewed, and the sample 100 is imaged on the lens 110 to be tested. An image detection component 120, therefore, in the measurement step, the template 100 must be set at different distances from the lens 110 to be tested for measurement, but the measurement conditions are: no matter how far the template 100 is from the lens 110 to be tested, The size of the image formed by each template 100 through the lens under test 110 must be the same. Therefore, in order to satisfy this condition, the size of the template 100 must change as the distance bet...

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Problems solved by technology

[0002] see figure 1 , shows the structural diagram of a known optical system for lens imaging quality testing. The most commonly used testing method for lens imaging quality is to use a standardized sample 100 as an object to be viewed, and the sample 100 is imaged on the lens 110 to be tested. An image detection component 120, therefore, in the measurement step, the template 100 must be set at different distances from the lens 110 to be tested for measurement, but the measurement conditions are: no matter how far the template 100 is from the lens 110 to be tested, The size of the image formed by each template 100 through the lens under test 110 must be the same. Therefore, in order to satisfy this condition, the size of the template 100 must change as the distance between the position of the template 100 and the lens 110 under test increases. be larger, so as to meet the above measurement conditions, such as figure 1 The size of the three templates 100 in 100a, 100b, and 100c increases with the distance from the lens 110 to be tested, and the size of the template 100 becomes larger and larger. In this way, it is quite uneconomical, and the space required for measurement and the replacement of the template 100 The time and manpower required will cause the inconvenience of measurement and the huge space for equipment

Related technologies such as China Taiwan Patent Publication No. M253795 and No. M253796 patents disclose a track-type focus detection box and a focus detection box for camera lenses, both of which are structures for replacing the template and mainly for adjusting the template structure. This structure can only be used for short-distance measurement. If the measurement distance needs to be several meters long, this structure will become very large

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