SU909650A1 - High-speed lens for hydrophotography - Google Patents

Description

(54) LIGHTWATER, HYDRAULIC EXTERNAL LENS

one

The invention relates to optical instrumentation, a class of lenses for imaging in liquid media.

A two-lens hydrographic lens is known; it contains a power component made of two symmetrically located three-glued elements, between which a diaphragm is placed, and a negative meniscus of the SE installed in front of the power component.

This lens has a large field of view, but has a very small relative aperture.

The closest in technical essence to the present invention is a high-aperture hydro-shooting lens containing two single negative lenses facing the concavity of the image and three positive components with a diaphragm in front of them, let’s take the last one from the positive and negative G2 lenses}.

The disadvantages of this lens are a small relative distance, a version and low illumination on the edge of the field of view.

The purpose of the invention is to increase the relative aperture and illumination at the edge of the floor while maintaining the image quality.

This goal is achieved by the fact that in high-aperture hydro imaging

10, the lens contains two single negative lenses facing the concavity of the image, and three positive components in front of which a diaphragm is placed, the last of which is glued together from a positive and negative lenses, a positive component located in front of the system and made in the form of a meniscus, facing concavity to

30 image, with the first positive component made of glued biconcave and double convex lenses, and the second - in the form of single

39096504

a negative meniscus reversed which allows it to work with kinovognost to the image, and two cameras with a mirror obturator, a convex lens.

Claims (2)

The drawing shows the optical layout of the lens. S Claim The lens consists of consecutive single positive meniscus 1 and two negative menisci 2 and 3, facing the concavity of the image, and three positive components, in front of which is a diaphragm. The first positive component is glued together from biconcave 5 and biconvex 6 lenses. The second component consists of a single negative meniscus 7 facing the concavity of the image, a two-convex line 8. The last positive component is glued from a two-convex lens 9 and a negative meniscus 10, This high-aperture hydroscopic lens has an aperture (with a 1: 1.5 aperture and Field 60 ° in water .. The illumination on the edge of the floor is increased and exceeds the magnitude of the center of the illumination in the center of the floor. The lens is achromatized in the wavelength range from 0.86 to 0.55 µm with good image quality. The lens has an A neat back section of 1.23 focal lengths A fast-acting hydro imaging lens containing two single negative lenses facing the image, and three positive components in front of which is placed a diaphragm, the latter of which is glued from positive and negative lenses, different the fact that, in order to increase the relative aperture and illumination on the edge of the floor while maintaining the image quality, a positive component is inserted into it, located in front of the system The first positive component is made of glued from two concave and two convex lenses, and the second in the form of a single negative meniscus turned concavity to the image, and a two convex lens. Sources of information taken into account in the examination 1. USSR author's certificate number, cl. G 02 In I / C, 1970. 2. USSR author's certificate number i 00868, cl. G 02 B 9/6, 1972 (prototype).