Invention Grant
- Patent Title: Apparatus for altering quantum of light passing through a lens of a photographic device
-
Application No.: US18166500Application Date: 2023-02-09
-
Publication No.: US12135463B2Publication Date: 2024-11-05
- 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
- Main IPC: G02B7/00
- IPC: G02B7/00 ; G02B5/20 ; G02B5/30

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
- US20230194821A1 APPARATUS FOR ALTERING QUANTUM OF LIGHT PASSING THROUGH A LENS OF A PHOTOGRAPHIC DEVICE BACKGROUND Public/Granted day:2023-06-22
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 |