Patent ID: 11868087
Assignee: HELLA GMBH & CO. KGAA
Field: Optics (Instruments)
Classification: CPC G  F | IPC F  G

Claim 0:
1. A method of producing a computer-generated hologram, the method comprising:
producing a reference beam;
producing an object beam;
applying computer-generated information regarding the hologram to the object beam; and
overlapping the object beam and the reference beam on or in a light-sensitive recording medium in order to apply the hologram by exposure,
wherein several portions of the light-sensitive recording medium are exposed, one after the other, to the object beam and the reference beam substantially simultaneously in order to produce a plurality of sub-holograms,
wherein a first angle of incidence at which the reference beam hits a first portion of a surface of the light-sensitive recording medium is different from a second angle of incidence at which the reference beam hits a second portion of the surface of the light-sensitive recording medium, and
wherein a change between the first and second angles of incidence of the reference beam is achieved by changing a point of incidence of the reference beam on a lens through which the reference beam passes on the way to the light-sensitive recording medium, and
wherein the reference beam passes through an immersion agent or an immersion liquid that is arranged between the lens and the light-sensitive recording medium or a substrate carrying the light-sensitive recording medium.