Multi-focus dodging lens and optical system

Abstract

The invention discloses a multi-focus dodging lens comprising a transmission unit and a total-reflection unit capable of peripherally enclosing the transmission unit. The transmission unit comprises a first collimation incident surface and a second collimation incident surface, which are provided with circular calibers, and are arranged sequentially along the central light beam transmission direction. The first collimation incident surface comprises more than two different curved surfaces, and the curved surface distribution structure of the second collimation incident surface is the same as that of the first collimation incident surface. The total -reflection unit comprises an incident side surface, a total-reflection side surface, and an outgoing side surface. The incident side surface is used for connecting the first collimation incident surface and the total-reflection side surface, and the outgoing side surface is used for connecting the total-reflection side surface with the second collimation transmission surface. The total-reflection side surface comprises more than two different curved surfaces, and the curved surface distribution structure of the outgoing side surface is the same as that of the total-reflection side surface. The invention also discloses an optical system. The multi-focus dodging lens is advantageous in that the blue edge or yellow edge phenomenon caused by the color separation can be prevented, and the dodging effect is good.

Description

technical field [0001] The invention relates to the field of optics, in particular to a multi-focus uniform light lens and an optical system. Background technique [0002] The white light we usually see is generally produced by coating yellow phosphor on the surface of the blue LED, which is the composite light of blue light and yellow light. The light emitted by LEDs is divergent, so it generally needs to be concentrated through a lens. [0003] However, the refractive index of each color of light in the same medium is different, resulting in that when the light of different colors passes through the lens, the blue light is transmitted more obliquely towards the center of the lens, while the yellow light is transmitted more obliquely towards the edge of the lens, Thus showing color separation and poor homogenization effect. Contents of the invention [0004] Based on this, it is necessary to provide a multi-focus uniform light lens with good light uniformity effect. ...

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Problems solved by technology

[0003] However, the refractive index of each color of light in the same medium is different, resulting in that when the light of different colors passes through the lens, the blue light is transmitted more obliquely towards the center of the lens, while the yellow light is transmitted more obliquely towards the edge of the lens, Thus showing color separation and poor homogenization effect

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