SU1675823A1 - Reproducing objective - Google Patents

Description

one

(21) 4738905/10

(22) 09.09.89

(46) 07.09.91. No. 33

(72) K.P.Spirov and V.V. Kireeva

(53) 771.351.6 (088.8)

(56) USSR Author's Certificate No. 871123, cl. G 02 B 13/24, 1979.

(54) REPRODUCTIVE OBJECTIVE

(57) The invention relates to the field of optical instrumentation, in particular to reproduction lenses with a flat field of view, and m. used to transfer the image from the screen of the x-ray electron-optical converter to the energy receiver. The purpose of the invention is to improve the quality of the image in the center and on the edge of the field of view. The first four components are located in front of the diaphragm 16 and are made respectively in the form of a meniscus-like positive glued lens 1, a negative meniscus 4, a positive dual-meniscus 5 and a single two-convex lens 8, and the components placed behind the diaphragm 16 are designed in a form of a convex lens 9, a negative duplex meniscus 10 of a single positive meniscus 13, a single negative flat-concave lens 14 and a single two-convex positive lens 15. The lens has an increase (0.96 x), linear field of view 20.4 mm, numerical aperture 0.36, focal length f -873.336. The lens is corrected for a Yao wavelength of 546 nm and achromatized for the spectral region I 1 - 486 nm to I 2 656 nm.1 ill.

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The invention relates to optical instrument making, in particular to flat-field reproduction lenses, and can be used in various photographic and especially motion-picture devices for transmitting an image from an optical-optical converter screen to energy receivers.

The aim of the invention is to improve the image quality at the center and at the edge of the field of view.

The optical layout of the lens is depicted in principle.

The lens contains a positive dual lens 1, glued together from double bent 2 and double convex 3 lenses, negative meniscus 4, positive meniscus 5, glued double double bent 6 and two double convex lenses, two double convex lens 8, a convex flat lens 9, negative meniscus 10, glued together with a biconvex 11 and bovine-bent 12 lenses, a positive meniscus 13, a flat-bent lens 14 and a two-convex lens 15. The aperture diaphragm 16 is located between the lenses 8 and 9. The distance between the components 1 and 4 is 0.04 focal length neither object Islands,

The lens has an increase of 0.963x; linear field of view 21 mm; 0.36 numerical aperture; focal length is 873.336 mm. The selected optical powers of the components, as well as the shape of the components 1, 4, 5 and 8, the total optical power of the components 9, 10, 13-15 cause a high degree of correction of spherical aberration. The presence of six negative lenses in the 12-lens objective and the choice of the first component in the form of a lens 1, and the second component a in the form of a steep meniscus 4, with the concave side facing the space of objects with a large air gap between them equal to 0.04 of the focal length of the lens, the choice of the fifth component in the form of a convex-flat lens 9 oh convexity to the space of objects, the sixth component in the form of convexity facing the space of the subject of the negative dual-glued meniscus 10;

convexity to the space of objects of a single positive meniscus 13, the eighth component in the form of a single negative flat-concave lens 14, the flat side facing the space of objects, and the ninth component in the form of a two-convex positive lens 15, detract from the high degree of correction of field aberrations, which allows to obtain

improved image quality in the center and on the edge of the field of view.

The longitudinal spherical aberration for the basic wavelength does not exceed 0.03 mm, the spherochromatism is not more than 0.1 mm,

astigmatism is not more than 0.02 mm; aberrations of wide oblique beams do not exceed 0.05 mm.

The lens is achromatized at 486-589 nm. Delete image from by. the last surface is 15,573 mm.

Claims (1)

Formula Image A reproduction lens containing nine components and an aperture diaphragm located between the fourth and fifth components, with the first component being a positively dual lens, the second being a negative meniscus facing inward towards the object, the third being a positive meniscus glued from the two are concave and double convex lenses, the fourth, fifth and ninth are single positive lenses, the sixth is a negative two-glued meniscus with a concavity facing the image, so that, in order to improve the quality of the image, the first component is glued together from biconcave and biconvex lenses, the second is made in the form of a single meniscus, the fourth and ninth the components are made in the form of double convex lenses; the fifth is in the form of a convex-flat lens; the sixth component is glued together from two convex and double-convex lenses; the seventh component is made in the form of a positive meniscus facing concavity to the image, the eighth is in the form of a flat-concave lens, and the distance between the second and third components is 0.04 of the objective focal length.