Title:
DESIGN METHOD FOR HYPERBOLOID COLLIMATING LENS FOR VEHICLE LAMPS
Document Type and Number:
WIPO Patent Application WO/2022/057519
Kind Code:
A1
Abstract:
Provided is a design method for a hyperboloid collimating lens for vehicle lamps, capable of solving the cumbersome and complicated problems of existing lens design methods. The method comprises the following steps: step 1, establishing a two-dimensional plane coordinate system by using a light source as the origin, including the establishment of an incident light, an exiting light and normal vectors; step 2, establishing an exiting vector equation of an exiting light formed after an incident light emitted by the light source passes through a spherical surface (A); and step 3, combining the fact that the exiting light from an external free-form surface (B) is a parallel beam, solving a normal vector of point (Bi-1, Bi) on the external free-form surface (B) using the law of refraction, using the normal vector to solve a tangential equation passing through the point (Bi-1, Bi), and solving an intersection of the tangential equation passing the point (Bi-1, Bi) and an equation of the exiting light from the spherical surface (A) to obtain coordinates of the point (Bi-1, Bi) on the external free-form surface (B). The front and rear surfaces (A, B) of the lens are designed as hyperboloids to constrain the exiting direction of light emitted from a light source, so that a beam is accurate and controllable, collimating effect is good, and the uniformity of spots on a target surface is high.
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Inventors:
YU CUNSHENG (CN)
LV WANYU (CN)
HUANG LIMIN (CN)
LV WANYU (CN)
HUANG LIMIN (CN)
Application Number:
PCT/CN2021/111688
Publication Date:
March 24, 2022
Filing Date:
August 10, 2021
Export Citation:
Assignee:
CHANGZHOU XINGYU AUTOMOTIVE LIGHTING SYSTEMS CO LTD (CN)
International Classes:
F21V5/04
Foreign References:
| CN104696884A | 2015-06-10 | |||
| CN105351885A | 2016-02-24 | |||
| CN107687623A | 2018-02-13 | |||
| CN207034989U | 2018-02-23 | |||
| CN102901044A | 2013-01-30 | |||
| US20110270585A1 | 2011-11-03 |
Attorney, Agent or Firm:
CHANGZHOU BAIYETENGFEI PATENT AGENCY (GENERAL PARTNERSHIP) (CN)
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