Patent · US Active

Device for acquiring equally blurred intermediate images

US8390932B2 · kind B2 · utility

15Cited by

5References

23Claims

0Family size

Assignee

Typonteq Company · CN

Inventors

Wei Jia · Honolulu, US
Yefeng Zhou · Beijing, CN

Key dates

Filing date	Feb 11, 2011
Grant date	Mar 5, 2013
Priority date	—
Expiry date	Sep 1, 2031

Classification

Technology area (CPC G)Physics
CPC primaryG02B27/0075
WIPO fieldOptics
WIPO sectorInstruments

Abstract

A device for acquiring equally blurred intermediate image to realize Extension of DOF imaging is characterized in that: the lens of said device produces space-invariant and approximately equal psf output in the designed range of the depth-of-field; the lens realizing space-invariant transfer characteristic is a multi-focal points lens with ray compensation; the angle of the ray guided by the multi-focal point changes in response to the object distance, but the corresponding position and energy distribution of the light spot on the image surface remain constant substantially.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.