Title:
FIXING STRUCTURE FOR OPTICAL ELEMENT, LENS ASSEMBLY AND ILLUMINANCE DETECTION DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/214278
Kind Code:
A1
Abstract:
A fixing structure for an optical element (3), a lens assembly and an illuminance detection device. The fixing structure for the optical element (3) comprises a fixing bracket (1) used for fixing the optical element (3) and a spring piece (2) disposed on the fixing bracket (1). The fixing bracket (1) is provided thereon with a fixing groove used for fixing the optical element (3) and a protruding surface (101) surrounding the fixing groove; the protruding surface (101) is recessed along the axial direction of the fixing bracket (1) to form a recessed surface (102); a plane at which the recessed surface (102) is located is located between the protruding surface (101) and a surface of the optical element (3); one end of the spring piece (2) is fixed to the recessed surface (102), and one end is pressed and fixed to the optical element (3). The described structure is structurally simple and conserves space. The optical element (3) has a low damage rate, a relatively reduced cost, and is convenient to replace. The lens assembly that adopts the described structure and the illuminance detection device may ensure the coaxiality of an attenuation piece and a convex lens. The assembly process is simple, the accuracy thereof may be ensured, and said process may be widely applied to the design of illuminometers for cinema light sources.
Inventors:
LEI CHENGFENG (CN)
Application Number:
PCT/CN2019/070536
Publication Date:
November 14, 2019
Filing Date:
January 05, 2019
Export Citation:
Assignee:
APPOTRONICS CORP LTD (CN)
International Classes:
G01M11/04; G02B7/00; G02B7/02
Foreign References:
| CN105842840A | 2016-08-10 | |||
| CN103472690A | 2013-12-25 | |||
| CN207123380U | 2018-03-20 | |||
| DE202009014837U1 | 2010-02-18 |
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