Ultraviolet imaging system

Details Ultraviolet imaging system Ultraviolet imaging system

2006-06-06

2006-06-06

Nguyen, Thong Q (Department: 2872)

Optical: systems and elements

Having significant infrared or ultraviolet property

Lens, lens system or component

C359S356000, C359S755000

Reexamination Certificate

active

07057804

ABSTRACT:
An ultraviolet imaging system includes at least two negative lens elements, and at least two positive lens elements. The ultraviolet imaging system satisfies the following conditions:in-line-formulae description="In-line Formulae" end="lead"?−3<f(i=330)/r1<−0.5  (1)in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?65<ν (ALL)  (2)in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?0<ν(i=330)(P)−ν(i=330)(N)<10  (3)in-line-formulae description="In-line Formulae" end="tail"?whereinf(i=330)designates the focal length of the entire ultraviolet imaging system with respect to a wavelength “i” of 330 nm (base wavelength);r1designates the radius of curvature of the object-side surface of the most object-side lens element;ν (ALL) designates a reciprocal of a dispersion value, with respect to the d-line, of the glass material of all of the lens elements;ν(i=330)(P) designates the reciprocal of the dispersion value, for the positive lens elements, with respect to the wavelength of 330 nm; andν(i=330)(N) designates the reciprocal of the dispersion value, for the negative lens elements, with respect to the wavelength of 330 nm.

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