SU1658113A1 - Catadioptric lens - Google Patents

Description

(21) 4717263 / 24-10

(22) 07/11/89

(46) 06.23.91. Bul No. 23

(71) Leningrad Institute of Fine Mechanics and Optics

(72) I.L.Anitropova, A.P.Grammatik and N.A.Domanska

(53) 771.351.7 (088.8)

(56) USSR inventor's certificate 1337866, cl. G 02 B 17/08, 1986.

USSR author's certificate # 1016756, cl. G 02 B 17/08, 1982.

(54) MIRROR-LENS LENS

(57) The invention relates to optical instrument making and can be used in devices for image transmission.

with a single increase. The purpose of the invention is to increase the anterior segment. Mirror-lens lens

contains consecutive primary concave 1 along the beam, secondary convex 2 spherical mirrors and three lens components, the first of which I is made of glued from a two-convex lens 3 and negative meniscus 4 facing the aperture diaphragm combined with the secondary convex mirror 2. The second lens component II is a negative glued lens, including a positive 5 and a negative 6 meniscus convex to the aperture diaphragm, the third lens component III is oboj biconvex lens 7, the lens Increase - I t linear field mm stroke along the length of the system subject to image lucha.ot mm.

about 16

(L

The invention relates to optical instrumentation and can be used in devices designed to transmit images with a single non-fold increase.

The purpose of the invention is to increase the front focal length.

The drawing shows the optical layout of the lens.

The mirror-lens lens contains successively located along the beam primary concave 1 and secondary convex 2 spherical mirrors and three lens components, the first of which I is glued together from a two-convex lens 3 and a negative meniscus 4 facing the aperture diaphragm combined with the secondary convex mirror 2.

The second lens component II, the negative glued lens, which includes a positive 5 and a negative 6 meniscus, is convex to the aperture diaphragm, and the third lens component III is a two-convex lens 7.

The luminous flux from an object located in the front focal plane of the two-mirror system 1 and 2 falls on the primary mirror 1, reflects from it and falls on the secondary mirror 2, reflected from the latter falls in a parallel beam of rays on the first lens component I, passes

but

SP

00

WITH

sequentially through all three lens components 1,11,111 and forms an image in the image plane.

I

An example of a specific implementation is a lens having a magnification, linear field of mm, aperture. 0.25, the length of the system — along the beam path from the subject to the image of mm — the lens operates in the spectral range (486 Ј. 546 46656) nm.

The first lens component I, made of glued materials TK 14 and TF 3, besides the power function, allows the correction of spherical aberration, position chromatism and coma.

The second lens component II, glued from STK 19 TFH materials, having aplanatic forms of the outer surfaces of the lenses included in it, provides correction for the image curvature and magnification chromatism.

The third lens component III, made in the form of a single two-convex lens from STK 19,

Claims (1)

provides correction of astigmatism and aberrations of wide oblique beams. The claims of the Mirror-lens lens containing primary concave and secondary convex spherical mirrors, aperture diaphragm and lens compensator mounted on the optical axis behind the second mirror and made in the form of successively installed on the optical axis of the first positive and second negative components and a two-convex lens, The first component is a two-element one, characterized in that, in order to increase the front focal length, the first component of the lens compensator is made glued together from a double convex lens and a negative meniscus, the second component of the lens compensator is made glued from positive and negative menisci that are convex to the aperture diaphragm, and the secondary convex spherical mirror is placed in the plane of the aperture diaphragm.