Patent · US Expired

Compact multiflash unit having protective cover component with integral light controlling means

US3993896A · kind A · utility

12Cited by

6References

7Claims

0Family size

Assignee

Patent-Treuhand-Gesellschaft fur elektrische Gluhlampen mbH · DE

Inventor

Alfred Wacker · Friedberg, DE

Key dates

Filing date	Mar 21, 1975
Grant date	Nov 23, 1976
Priority date	—
Expiry date	Mar 21, 1995

Classification

Technology area (CPC G)Physics
CPC primaryG03B15/0442
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A compact multiflash unit that contains a plurality of flashlamps, which mounted on a base member along with reflector members, is provided with a protective plastic cover having light-controlling prisms molded into its side walls. The prisms are so oriented and profiled that they serve as integral optical elements which direct the light rays from the "fired" lamps toward the scene being photographed, thereby compensating for the lateral spreading of the light rays produced by the shortened reflector members.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.