Methods of, apparatus for, and a camera capable of automatically selecting an optimal angle for bounce illumination
US5194885A · kind A · utility
23Cited by
8References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 17, 1991 |
| Grant date | Mar 16, 1993 |
| Priority date | — |
| Expiry date | Jun 17, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B2215/0535
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The angle ".alpha." which an illumination axis of an illuminator, such as a flash illuminator, assumes with respect to the optical axis of a camera in a bounce flash mode is selected in accordance with the equation: EQU .alpha.=Tan.sup.-1 (2H/D) wherein; PA0 H=the distance from the camera to the ceiling; and PA0 D=the distance from the lens of the camera to the subject. Preferably, values for H and D are determined by range finders on the camera and the equation is solved by a logic circuit. The output of the logic circuit causes a servo motor to angularly position the illuminator on the camera.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.