Ophthalmonogy probe imaging system

Abstract

The invention discloses an improved off-axis imaging system which comprises a lens that is arranged in a way of off-axially deflecting an angle, and the angle leads a lens axis to dead against an object space. An improved off-axis imaging method comprises the step of deflecting the lens with the angle when a light path is off-axially arranged so as to lead the state of the lens axis to be changedinto the state of being dead against the object space into the state of being vertical to the object space. An ophthalmonogy probe imaging system comprises an OCT processing device and an ophthalmonogy probe, wherein the ophthalmonogy probe comprises an illumination light path, an object lens, a lens and a photoelectric conversion unit, an image formed by eyeground reflected light through the object lens is used as the object space which is imaged on the photoelectric conversion unit through the lens, the lens is arranged in a way of off-axially deflecting an angle, and the angle leads the lens axis to dead against the image. The ophthalmonogy probe imaging system reduces various imaging aberrations such as chromatic aberration, spherical aberration, astigmatism, coma and the like with respect to an off-axis light path, is beneficial to improve the imaging definition, and also keeps the advantages of the off-axis light path with respect to a coaxial light path.

Description

【Technical field】 [0001] The invention relates to the field of optical imaging, in particular to an ophthalmic probe imaging system. 【Background technique】 [0002] Generally, the imaging optical path is divided into on-axis optical path and off-axis optical path. When using a coaxial optical path, in order to reduce aberrations, the number of lenses has to be appropriately increased to extend the length of the optical path. Therefore, generally speaking, the length and volume of the coaxial system are relatively large. The so-called off-axis imaging system usually refers to such as figure 1 The light path shown. Depend on figure 1 It can be seen that in the off-axis optical path, the object P and image P1 deviate from the main optical axis of the lens. Off-axis imaging systems have several disadvantages. When the aperture and field of view of the optical system exceed the paraxial region, the image quality will gradually decrease. This is because among the light beams...

AI Technical Summary

Problems solved by technology

Limited by objective conditions, no optical system can generate a theoretically ideal image, and the existence of various aberrations affects the image quality

The aberration of the above off-axis imaging system is very large, which affects the imaging clarity

If a special off-axis lens is used to reduce aberrations, the cost is high and the design is complicated

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