Focal plane shutter and method for producing same
US5797055A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 5, 1996 |
| Grant date | Aug 18, 1998 |
| Priority date | — |
| Expiry date | Jul 5, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B9/40
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An extremely durable, super-high speed shutter with speeds of 1/8000 second or faster advantageously increases the blade acceptance rate, reduces the cost, prevents abnormalities such as light leaking between the curtains and the like, contributes to the implementation of a super-high speed shutter with speeds exceeding 1/8000 of a second, corresponding to TTL multi-pattern light adjustment, and the like. The shutter includes a front curtain and a rear curtain each including a plurality of dividing blades; and at least one of the dividing blades among the front curtain and the rear curtain that is positioned on the photo lens side is formed from a black material having at least one uncoated surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.