A large field of view optical system for video microscopy and photography

Abstract

The invention discloses a video microscopic and photographic large-visual-field optical system, which is composed of a cemented lens, a positive meniscus lens, a negative meniscus lens, a positive meniscus lens and an eyepiece group, wherein an aperture diaphragm is arranged between the positive meniscus lens and the negative meniscus lens. When the video microscopic and photographic large-visual-field optical system is used for photomicrographing, the operating distance of the system is 8mm, the magnifying power is 65 times, the diameter of an object-side linear field of view is 5.5mm, and the numerical aperture is 0.25 mm. When the video microscopic and photographic large-visual-field optical system is used for medium-and-long distance photographing, the objective focal length of the system is 75.5mm, the eyepiece focal length is -11.65mm, the extended magnifying power is 6.5 times, the field of view is 15.5 degrees, and the operating waveband of the objective system ranges from 0.5 micron to 0.75 micron. When the video microscopic and photographic large-visual-field optical system serves as a microscope, the different sizes of objects can be measured clearly, requirements for photographing objects at different distances of mobile phone photography can be satisfied when the system serves as a photographic lens, the video microscopic and photographic large-visual-field optical system can satisfy requirements of different mobile phone screens when used in long-distance photographing, and can have high image contrast and definition.

Description

technical field [0001] The invention relates to the field of optoelectronic technology, in particular to a video microscope and photography large field of view optical system. Background technique [0002] The video microscope and photography large-field optical system developed by using optical technology, the performance of the video camera system has changed from the pure "watching" of the external scene in the past to the "recognition and recognition" of the present, and the video microscope is following The development of mega-pixel high-resolution CCD or CMOS image detectors has been widely used. The video microscope images the observed object on the CCD or CMOS surface through a high-definition video microscope, and converts the video signal into a numerical signal and stores it in the In the computer, the image is displayed on the monitor or directly on the screen of the mobile phone. Combined with the measurement software, the observed object can be quantitatively m...

AI Technical Summary

Problems solved by technology

A video microscope and a photographic lens are two different instruments, and there is no instrument that can be used as a video microscope or as a photographic lens in the prior art

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