0658780-A1 is referenced by 2 patents and cites 10 patents.

Directional filter, characterised by a plurality of lamellae (L, Figure 2) which form mutually parallel beam wells (beam shafts), the interspaces being filled (Figure 4) by transparent support bodies (T, Figure 1) whose refractive index causes the incident light to be refracted towards the normal on the plane of incidence, and methods for the production thereof.

Title
Directional filter for lighting fixture and method of manufacture.
Application Number
EP19940118755 19941129
Publication Number
0658780 (A1)
Application Date
November 29, 1994
Publication Date
June 21, 1995
Inventor
Raimondi Rinaldo
CH
Assignee
Raimondi Bruno
CH
Raimondi Staeuble Olga
CH
Raimondi Enrico
CH
IPC
F21V 11/02
G02B 05/00
G02B 05/00
F21V 11/00
G02B 05/00
F21V 11/02
View Original Source Download PDF