Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
G02B23/12—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices with means for image conversion or intensification
Landscapes
Physics & Mathematics
(AREA)
Astronomy & Astrophysics
(AREA)
General Physics & Mathematics
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Optics & Photonics
(AREA)
Eye Examination Apparatus
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Photometry And Measurement Of Optical Pulse Characteristics
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Reklame-Leuchtbuchstabe, bei dem die Flaechenteile von der Mitte bzw. vom Schwerpunkt aus bei veraenderlichem Auftreffwinkel der Lichtstrahlen einer Lichtquelle gleich stark beleuchtet sind