Camera
US5678093A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 18, 1996 |
| Grant date | Oct 14, 1997 |
| Priority date | — |
| Expiry date | Apr 18, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B17/425
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A camera having: a substantially cylindrical-shaped, rotatable cam, limited to rotate unidirectionally. A drive belt conveys rotation of the rotary member, which rotates due to zooming of lens array, to drive the cam. A viewfinder optical system including a stationary objective lens, two prisms, a stationary eyepiece lens, and two variable-power lenses, when coupled with the cam member, advances or withdraws along the optical-axis during movement. An eyepiece variable-power lens is inserted into the optical path of the viewfinder optical system. A viewfinder panoramic field mask is united with an eyepiece variable-power lens. Upper and lower masks change picture size. A first rack extends in a moving direction of the masks. A second rack extends in a moving direction of the viewfinder panoramic field mask. A panoramic-mode setting gear engages the two racks. A plurality of panoramic-mode parallax compensation marks appear at a trimmed range position within the viewfinder field mask. Normal picture size-mode parallax compensation marks are removed from the field during a high power. A viewfinder objective lens sliding axis pin retained by the objective lens or first prism, guides th…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.