Lens and optical module using the same

Abstract

A lens is used to change the height of a laser beam outputted by an edge-emitting type laser diode, and comprises a first reflector, wherein the first reflector is an inclined surface facing the laser beam, and is used to reflect the laser beam; a second reflector parallelly arranged with the first reflector, wherein the second reflector is used to reflect the laser beam reflected by the first reflector again; a transmission plane connected with the first and second reflectors, wherein the laser beam reflected by the second reflector is refracted in the lens by the transmission plane; and an exit facet oppositely arranged with the transmission plane, wherein the laser beam refracted in the lens by the transmission plane is refracted out the lens by the exit facet. The present invention also relates to an optical module using the lens. According to the present invention, the laser beams irradiated in the lens is reflected by the first and second reflectors continuously and then is refracted by the transmission plane and the exit facet continuously to be refracted out the lens, thereby changing the height of the laser beam.

Description

technical field [0001] The invention relates to an optical module using a lens, in particular to a lens capable of changing the height of a laser beam output by a laser diode and an optical module using the lens. Background technique [0002] Laser Diode (Laser Diode, LD) as a high-efficiency light source, has many characteristics such as good monochromaticity, small beam emission angle, high luminous intensity, small size, and long life, and has been widely used in the field of optical communication. Since the laser beam output by the edge-emitting laser diode (Edge-emitting Laser Diode) is emitted from the side of the edge-emitting laser diode, it is often used as a light source in a laser projection system to reduce the overall thickness of the laser projection system. [0003] Ordinary edge-emitting laser diodes will be placed on the pads of the substrate through the method of solid crystal, and the edge-emitting laser diodes will be fixed on the substrate with fixing gl...

AI Technical Summary

Problems solved by technology

[0003] Ordinary edge-emitting laser diodes will be placed on the pads of the substrate through the method of solid crystal, and the edge-emitting laser diodes will be fixed on the substrate with fixing glue. However, due to the thinner thickness of the edge-emitting laser diodes, the circuit board The thickness of the welding pad and fixing glue is usually very thin, resulting in the distance from the light-emitting position of the edge-firing laser diode to the substrate is less than 100 microns, which makes it difficult to cooperate with other optical components (such as beam splitters, mirrors, etc.)

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