Rod lens array and life-size imaging optical apparatus using the

Details Rod lens array and life-size imaging optical apparatus using the Rod lens array and life-size imaging optical apparatus using the

1998-07-29

1999-11-02

Epps, Georgia

Optical: systems and elements

Lens

With graded refractive index

359653, 359654, G20B 300

Patent

active

059781467

ABSTRACT:
In a rod lens array in which a plurality of rod lenses each having a refractive-index distribution in the radial direction are arranged in one row such that the optical axes are parallel to each other, and in a life-size imaging optical apparatus using the rod lens array, the outside diameter of each rod lens is such that 0.05 mm.ltoreq.R.ltoreq.0.25 mm and 0.5R.ltoreq.r.sub.0 .ltoreq.1.0R (2R: the distance between the optical axes of adjacent rod lenses and r.sub.0 : the radius of the effective area of each rod lens that provides a lens action) and the degree of overlap m defined by m=x.sub.0 /2R is such that 1.61.ltoreq.m.ltoreq.1.80 or 2.06.ltoreq.m.ltoreq.2.50 where X.sub.0 is the view radius of a single rod lens which is given by X.sub.0 =-r.sub.0 /cos(Z.sub.0 .pi./P).

REFERENCES:
patent: 3827785 (1974-08-01), Matsushita et al.
patent: 4844589 (1989-07-01), Ashara et al.
patent: 5450157 (1995-09-01), Rees
patent: 5568320 (1996-10-01), Rees et al.

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