LED free-form curved face lens used for optical microscope illumination system

Abstract

The invention discloses an LED free-form curved face lens used for an optical microscope illumination system. The lens comprises three free-form curved faces. A cavity is formed in the center of the bottom face of the lens, wherein an LED is arranged in the cavity. One part of the cavity wall of the cavity is a cylindrical face which forms an inner side cylindrical face, and the other part of the cavity wall is a free-form curved face which forms an inner side free-form curved face. The inner side free-form curved face is located on the top of the inner side cylindrical face. The inner side free-form curved face and the inner side cylindrical face form an incidence face of the lens. The outer side face of the lens is a free-form curved face which forms an outer side free-form curved face. The middle of the top face of the lens is a free-form curved face which forms a top free-form curved face. The outer side of the top free-form curved face is a partial cylindrical face. The top of the partial cylindrical face is a plane which forms a top plane. A transmitting face of the lens is composed of the top free-form curved face and the top plane of the lens. The LED free-form curved face lens is compact in structure and small in size; the LED free-form curved face lens used for the optical microscope illumination system can form circular light spots which are uniform in illumination distribution on a target illumination face, and meanwhile the high optical efficiency is kept.

Description

technical field [0001] The invention relates to the field of LED lighting, in particular to an LED free-form surface lens used in an optical microscope lighting system. Background technique [0002] Microscope is a precise optical instrument, which has been used in many fields, especially in biology, medicine, experimental teaching and other fields. Its performance is mainly determined by the optical system, such as objective lens, eyepiece, lighting system and so on. In many cases, it is difficult for a well-designed microscope to achieve ideal imaging results. One of the main reasons is that the lighting system is not adjusted to the best state, so that the measured object cannot be well illuminated. [0003] Light sources commonly used in microscope illumination systems include metal halide lamps, arc lamps, and LED light-emitting diodes. The former two are large in size and energy consumption, and do not have excellent monochromaticity. As a new competitive solid-stat...

AI Technical Summary

Problems solved by technology

However, due to the different luminous characteristics of LEDs from traditional light sources, it is usually not possible to obtain the desired effect when directly applied to the microscope illumination system.

And because the illumination distance of the microscope is usually not fixed, it also brings new obstacles to the application of LED in the microscope.

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