Slotted peep
US6628464B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | May 14, 1997 |
| Grant date | Sep 30, 2003 |
| Priority date | — |
| Expiry date | Jul 23, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B23/14
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The slotted peep of this invention is a device that eliminates the detrimental effects of diffracted light from its aperture. Diffraction causes light to bend toward and perpendicular to an object's edge. In a current peep's aperture diffracted light is neither controlled nor eliminated. Diffracted light creates several shortcomings in current peeps which impair their accuracy and utility. The current aperture must be oversized to allow space for the diffracted light. The visual size and shape of the current aperture will vary with changes in the light diffraction. Under low light conditions, enough light may be diffracted within the current peep aperture that a user may not be able to see through the peep. A slotted peep is designed to eliminate detrimental effects of diffracted light from its aperture. By surrounding an open space with the open ends of slots, a space is defined that has virtually no physical edges. A slot of the slotted peep confines diffracted light within the slot. “(FIG. 1)” shows slotted peep,“(22)”. What a user looking through the slotted peep would see is, “(20)”. Light diffracted perpendicular to the edges of the slots d…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.