161.
(11) Patent number: 2154849
(46) Date of publication: 20.08.2000
(51) Int. Cl.7: G 02 B 13/14, 17/08
(21) Application number: 98105180/28
(22) Application date: 17.03.1998
(71) Applicant:
Konstruktorsko-tekhnologicheskij institut prikladnoj mikroehlektroniki SO RAN
(72) Inventor:
Klevtsov Ju.A.,
Ul'janova E.O.
(73) Proprietor:
Konstruktorsko-tekhnologicheskij institut prikladnoj mikroehlektroniki SO RAN
(98) Mail address:
630090, g.Novosibirsk, ul. Nikolaeva 8, Konstruktorsko-tekhnologicheskij institut prikladnoj mikroehlektroniki SO RA
(54) ULTRAVIOLET OBJECTIVE
(57)
FIELD: optics. SUBSTANCE: objective includes primary concave parabolic mirror, secondary spherical mirror and correction element. Correction element is made of three lenses with same refractive index. Extreme lenses are negative and are produced in the form of meniscuses facing space of images with concavity and central lens is biconvex. EFFECT: improved quality of image and expanded spectral range of operation. 5 dwg, 1 tbl
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