SU1432440A1 - Fast lens with remoted entrance pupil - Google Patents

Abstract

The invention relates to optical Koj instrumentation and m. used to create high-quality high-aperture television lenses for transmitting television cameras with an increased number of decomposition elements. The purpose of the invention is to increase the angle of field of view and relative aperture, expanding the spectral range and improving image quality. Rays of light successively pass through a double-curved lens 1, forming the first negative component, positive menisci 2 and 3, forming the second positive component, glued two-convex lens 4 and negative meniscus 5, forming the third positive component, two-convex lens 6, double curved lens 7 and positive meniscus 8, forming the fourth positive component. 1 il. € cl

Description

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5h 7

9 Yu

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The invention relates to optics, a class of television lenses.

The purpose of the invention is to increase the field angle of view and relative aperture, broaden the spectral range and improve image quality.

The drawing shows a lens for optical design.

The object consists of a double-concave lens 1, positive menisci 2 and 3, glued together by a double convex lens 4 and a negative meniscus, as well as glued together by a two-cone 6 and double-folded 7, dans and a positive meniscus 8. Plokoparallelnye plates 9 and 10 are are part of the television camera, which is taken into account when calculating the lens.

Lens 1 is the first lens of the lens, menisci 2, 4 and 3 are the second, lenses 4 and 5 form the third component, and lenses 6-8 are the fourth component.

The second, third, and fourth-left components are positive. The entrance pupil of the lens is brought forward.

Performing the first component in the form of a double-concave lens 1 allows the spherical aberration and coma to be corrected in wide beams, which occur with a large offset of the entrance pupil, and leads to the possibility of increasing the angular field and the rear focal length of the lens. The implementation of this component of glass of the TBPH brand with this form of the component makes it possible to minimize the chromatic coma. Execution of the second component of the two menisci 3 and. concavity to the lens, allows to increase the relative

High-aperture lens with a remote pupil

50

lens version, to improve the correction of astigmatism with an increase in the angle of the component, the first of which is the gender, and also to influence the meridional coma in the sagittal section. Enforcement of the CTC glass meniscus is optimal for providing correction of astigmo chromatism in the extended spectral range. The implementation of the third component positive contributes to an increase in the relative aperture. The use of abnormal glueing in this component (TBFT-TPCh glass) allows to correct astigmatism, astigmo-chromatism and spherical aber55

a second, third, and fourth positive, the first component is made as a double-concave lens, the second one contains a positive meniscus facing the concavity towards the limit, the third one is a two-glued two-convex lens, the fourth one is a glued meniscus reversed by a concavity to the image differing from that, with a chain of increasing the field of view and relative aperture, extending the spectral range and improving the quality

to

15 20

five

higher-order walkie-talkie in wide oblique beams.

The fourth component is made of three-glued from a double-cone 6 and a double-concave 7 lenses and a positive meniscus 8, which has a concavity facing the image. Such an embodiment of the component allows increasing the aperture, correcting astigmo chromatism, color curvature, chromatic coma, magnification chromatism, chromatic spherical aberration in wide oblique beams in the meridional and sagittal sections.

An example of a specific implementation of the invention is a lens with the following parameters:

Focal distance

Relative hole

Corner field

Removal of the entrance pupil

Rear focal

segment (without

plates 9 and 10)

Spectral range

30 mm

1: 1,8

35 ° 20 mm

0

five

0

19 mm

From 486 to

900 nm

The minimum spectral sensitivity is 700 ± 20 nm. The quality of the aberration correction of the lens is characterized by the following values: longitudinal spherical aberration no more than 0.02 mm; image curvature in the meridional and sagittal sections of not more than 0.04 mm; astigmatism not more than 0.025 mm; aberration of wide meridional beams no more than 0.02 mm.

Claims (1)

Formula invented Aperture lens with a remote pupil, containing four re component, the first of which is five a second, third, and fourth positive, the first component is made as a double-concave lens, the second one contains a positive meniscus facing the concavity towards the limit, the third one is a two-glued two-convex lens, the fourth one is a glued meniscus reversed by a concavity to the image differing from that, with a chain of increasing the field of view and relative aperture, extending the spectral range and improving the quality 314324404 image, the second component of the dope-convex lens and the negative one is changed by the second positive meniscus, niska, and the fourth component is glued together facing the concavity to the object, from a two-convex lens, the double-curved third component is glued together from a double-lens and a positive meniscus.