Invention concerning a condensor lens
First Claim
1. Condenser lens for production of essentially parallel light beams, in which the condenser lens (8) curves essentially in the form of a shell about its focal point (F) and has, at least in a region (27) on the inside (20) of the shell, a Fresnel structure in the form of teeth (16) that are bounded by light entry surfaces (14) and reflection surfaces (15), characterized by the fact that, in region (27), the outside (21) of the shell has gradations formed from outlet surfaces (18) and connection surfaces (19), the outlet surfaces (18) being aligned essentially normal and the connecting surfaces (19) that connect the adjacent outlet surfaces (18) being aligned essentially parallel to optical axis (2).
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Accused Products
Abstract
A condenser lens for generation of essentially parallel light beams, in which the condenser lens (8) curves essentially in the form of a shell around its focal point (F) and has, at least in one region (27) on the inside (20) of the shell, a Fresnel structure in the form of teeth (16) that are bounded by light inlet surfaces (14) and reflection surfaces (15). In the region (27), the outside (21) of the shell has gradations formed from outlet surfaces (18) and connecting surfaces (19), in which the outlet surfaces (18) are aligned essentially normal and the connecting surfaces (19) that join the adjacent outlet surfaces (18) are aligned essentially parallel to the optical axis (2). The slope and position of the reflection surfaces (15) of teeth (16) are established, so that an imaginary boundary light beam (6a), coming from focal point (F) and touching the tooth edge (22) of the preceding tooth, touches the indentation base (23) after refraction on the inlet surfaces (14) or encounters the reflection surface (15) in its immediate vicinity and runs parallel to the optical axis (2) after its reflection.
30 Citations
22 Claims
- 1. Condenser lens for production of essentially parallel light beams, in which the condenser lens (8) curves essentially in the form of a shell about its focal point (F) and has, at least in a region (27) on the inside (20) of the shell, a Fresnel structure in the form of teeth (16) that are bounded by light entry surfaces (14) and reflection surfaces (15), characterized by the fact that, in region (27), the outside (21) of the shell has gradations formed from outlet surfaces (18) and connection surfaces (19), the outlet surfaces (18) being aligned essentially normal and the connecting surfaces (19) that connect the adjacent outlet surfaces (18) being aligned essentially parallel to optical axis (2).
- 14. Light for generation of essentially parallel light beams, in which the light includes at least one preferably point-like light source (5), for example, an LED, and a condenser lens (8), in which the light sources (5) is arranged at least close to focal point (F) of condenser lens (8), and in which the condenser lens (8) curves essentially in the form of a shell about focal point (F) and has a Fresnel structure in the form of teeth (16) that are bounded by the light inlet surfaces (14) and reflection surfaces (15), at least in one region (27) on the inside (20) of the shell, characterized by the fact that in region (27) the outside (21) of the shell has gradations formed by outlet surfaces (18) and connecting surfaces (19), the outlet surfaces (18) being aligned essentially normal and the connection surfaces (19) that connect the adjacent outlet surfaces (18) being aligned essentially parallel to the optical axis (2).
Specification