Erect life-size lens array

Details Erect life-size lens array Erect life-size lens array

2011-07-26

2011-07-26

Mack, Ricky L (Department: 2873)

Optical: systems and elements

Single channel simultaneously to or from plural channels

By surface composed of lenticular elements

Reexamination Certificate

active

07986460

ABSTRACT:
An erect life-size lens array having a deep focal depth is realized. The erect life-size lens array includes a first lens array, a second lens array, a third lens array, a first aperture and a second aperture, wherein when a distance between a second principal plane of the second lens and a first principal plane of the third lens is ξ1, a distance between a second principal plane of the third lens and a design image surface is ξ2, a radius of a circular hole of the aperture is ra, and a defocus amount is ξ3, the erect life-size lens array is for causing an MTF at a spatial frequency ν to become MTFtargetor more and satisfiesin-line-formulae description="In-line Formulae" end="lead"?(J1(2π·ra·((1/ξ1)+(1/ξ2))·ν·ξ3))/(π·ra·((1/ξ1)+(1/ξ2))·ν·ξ3)≧MTFtarget,in-line-formulae description="In-line Formulae" end="tail"?where J1is a first type first-order Bessel function.

REFERENCES:
patent: 5689315 (1997-11-01), Fushimi et al.
patent: 6396636 (2002-05-01), Sawaki et al.
patent: 2006-14081 (2006-01-01), None

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