The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 17, 1987
Filed:
Dec. 27, 1985
Applicant:
Inventor:
Timo H Piironen, Oulu, FI;
Assignee:
Valtion teknillinen tutkimuskeskus, Espoo, FI;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F21V / ;
U.S. Cl.
CPC ...
362350 ; 362 16 ; 362809 ; 362458 ; 362356 ; 362297 ; 362347 ; 354126 ;
Abstract
When examing visually uneven surfaces the problem is the disappearing of the areas remaining in the shade from the picture. To the lighting device in accordance wiht the invention for illumination of and elimination of shades from uneven surface (1) belong a source of light (2), a mainly globular reflecting contrivance (3), the interior surface of which is equipped with reflecting material, and to which openings (4, 5) for the examining of the surface and holes (6) for conducting of the light into the reflecting contrivance are formed, as well as a reflector element (7) for reflecting of light through the opening (4) into the reflecting contrivance.