Invention Publication
- Patent Title: APPARATUS FOR ALTERING QUANTUM OF LIGHT PASSING THROUGH A LENS OF A PHOTOGRAPHIC DEVICE BACKGROUND
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Application No.: US18166500Application Date: 2023-02-09
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Publication No.: US20230194821A1Publication Date: 2023-06-22
- Inventor: Hitesh Gopal Gwalani
- Applicant: Freewell Industry Company Limited
- Applicant Address: HK Hong Kong
- Assignee: Freewell Industry Company Limited
- Current Assignee: Freewell Industry Company Limited
- Current Assignee Address: HK Hong Kong
- The original application number of the division: US17145420 2021.01.11
- Main IPC: G02B7/00
- IPC: G02B7/00 ; G02B5/30 ; G02B5/20

Abstract:
An apparatus for altering quantum of light passing through a lens of a photographic device. The apparatus comprises of a base assembly configured to be detachably coupled to the lens of the photographic device, a first assembly comprising a first filter, a second assembly comprising a second filter and a third assembly comprising a third filter. The first assembly is configured to be detachably coupled to the base assembly. The second assembly is configured to be detachably coupled to the base assembly. The third assembly is configured to be detachably coupled to the base assembly. Combination of the first filter and the second filter forms a first range of neutral density filter and combination of the first filter and the third filter forms a second range of neutral density filter.
Public/Granted literature
- US12135463B2 Apparatus for altering quantum of light passing through a lens of a photographic device Public/Granted day:2024-11-05
Information query
IPC分类:
G | 物理 |
G02 | 光学 |
G02B | 光学元件、系统或仪器 |
G02B7/00 | 光学元件的安装、调整装置或不漏光连接 |