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A light source viewing angle adjustment system

A technology for adjusting the system and field of view, which is applied in the field of optical components, can solve problems such as poor adjustment effect, and achieve the effects of simple structure, improved adjustment effect, and wide application range

Active Publication Date: 2022-05-20
HANGZHOU DIANZI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the problem of poor adjustment effect of the light source zoom and beam direction adjustment mechanism in the prior art, and provide a simple free-form surface zoom adjustment light source viewing angle adjustment system and beam direction

Method used

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  • A light source viewing angle adjustment system
  • A light source viewing angle adjustment system
  • A light source viewing angle adjustment system

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] like Figure 1~4 A flashlight with variable divergence angle and field of view is shown, the lens mechanism adopts Alvarez lens group, the light source 3 adopts LED flashlight, the driving mechanism is driven by piezoelectric ceramics, and the lens mechanism is composed of the first lens element 1 and the second lens element 2 Composition, the materials of the two lens elements are both E48R, the second lens element 2 and the first lens element 1 are arranged side by side with the first lens element 1, and there is a gap between the first lens element 1 and the second lens element 2, The gap can accommodate the movement of the first lens element 1 and the second lens element 2 perpendicular to the optical axis without contact between the two lens elements. The other side of the first lens element 1 is provided with an LED flashlight, and the driving mechanism adjusts the first lens element. The relative position of the lens element 1 and the second lens element 2, the d...

Embodiment 2

[0075] Example 2, such as Figure 5-10 In the LED lighting system with variable angle and direction shown, the lens mechanism adopts E48R in the first lens element 1 and the second lens element 2 of the Alvarez lens group, and the refractive index is n=1.53. The first lens element 1 The first surface is a plane, the second surface is a polynomial surface, the third surface of the second lens element 2 is a polynomial surface, the fourth surface is a plane, the second surface and the third surface are complementary, and the polynomial surface satisfies:

[0076]

[0077] The first surface faces the LED light source 3, the second surface is opposite to the third surface, and the fourth surface emits an outgoing light beam, the light-emitting area of ​​the LED light source 3 is 0.2mm*0.2mm, and the distance from the LED to the first surface of the first lens element 1 L=2mm, the adjustment of the lens mechanism to the outgoing light beam meets the requirements described in Emb...

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Abstract

The invention discloses a system for adjusting the viewing angle of a light source, which includes a lens mechanism and a driving mechanism. The lens mechanism includes a first lens element and a second lens element, and the second lens element and the first lens element are arranged in parallel with the first lens element. One side, the other side of the first lens element is provided with a light source, the driving mechanism adjusts the relative position of the first lens element and the second lens element, and the driving mechanism adjusts the first lens element and / or the second lens respectively along the direction perpendicular to the optical axis The position of the element, thereby changing and adjusting the divergence angle and / or beam direction of the light source through the lens mechanism. The adjustment of the divergence angle of the outgoing light beam and the direction of the outgoing light beam can be realized through small adjustments inside the lens mechanism. The surface curves of the first lens element and the second lens element can be adjusted in cooperation, so that no jump adjustment can be realized, and the adjustment effect can be improved. The adjustment of the driving mechanism along the direction perpendicular to the optical axis can realize the adjustment of the beam direction and the divergence angle, the structure is simple, and the application range is wide.

Description

technical field [0001] The invention relates to the field of optical elements, in particular to a system for adjusting the viewing angle of a light source. Background technique [0002] In photo photography, the scene coverage angle range can vary from wide angle to small angle range when shooting with zoom lens. At this time, it is necessary for the flashlight that provides flash lighting to have a suitable beam irradiation angle that matches it according to the range of shooting angles. Photographic zoom lenses can vary from telephoto to wide-angle, and the best image quality is achieved when the flash illumination angle is adjusted to correspond to the angle of the scene being imaged. For example, when taking a long-focus and telephoto photo, the best flash lighting is that the beam angle should be small, and it will be irradiated on distant objects like a parallel beam. Has a relatively large irradiation angle. [0003] For example, a "Field Angle Adjustment Method an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03B15/04F21V14/06
Inventor 侯昌伦叶枫侯明轩任驿泽
Owner HANGZHOU DIANZI UNIV