Lens barrel having at least two cylinders which join to block out leakage light
US5654834A · kind A · utility
0Cited by
6References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 3, 1995 |
| Grant date | Aug 5, 1997 |
| Priority date | — |
| Expiry date | May 3, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B7/20
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In a lens barrel having at least two joinable cylinders made of plastic, a sink mark is hard to be formed in the two cylinders and the compactness of the lens barrel and low cost are maintained while the construction is not complex and the number of parts is not increased. The leakage of light is prevented even when a joint is shallow.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.