Photo-detector based calculating means having a grating wheel with integrated lenses
US6100519A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Jun 2, 1998 |
| Grant date | Aug 8, 2000 |
| Priority date | — |
| Expiry date | Jun 2, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/347
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A photo-detector based calculating means having a grating wheel with integrated lenses is provided. The photo-detector based calculating means having a grating wheel with integrated lenses includes a light source (1), a grating wheel (2), and a photo-detector (3), with the light emitted from the light source (1) impinging upon an input plane of the grating wheel (2). The photo-detector (3) has a set of photo-sensitive chips (31) to receive the working light beams emitted from the grating wheel (2). The input plane of the grating wheel (2) has a ring-shaped lens (24) to focus the light emitted from the light source (1). The output plane (23) of the grating wheel (2) has a plurality of tooth-shaped lenses (25), each projecting perpendicularly to the ring-shaped lens (24), which can focus the working beams after the working beams pass through the output plane (23), thus minimizing interference.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.