SU830277A1 - Reflex objective - Google Patents

Description

I

The invention relates to instrumentation, in particular, to an astronomical building industry, and can be used to create instruments that operate in a wide spectral range with high visual fields (several degrees).

Known, widely used in astronomy, the classical, two-mirror systems of Cassegrain, Schwarzschild in others. Dl

However, lenses provide high image quality only on zero, measuring about one degree.

And esgen also has a mirror lens, which includes, in addition to the aspherical and main spherical mirrors, a flat mirror. The introduction of an additional flat mirror in the course of the rays between the aspherical and spherical mirrors does not affect the image correction G2.

However, in such an objective, the smaller asranisation of the beams by the receiving node, the dimensions of the KOTOpoixy are usually significantly lower.

exceeds the size of the working floor of the object.

Closest to the invention is a lens containing a primary aspherical mirror and the main concave spherical mirror whose focal length determines the focus (FIX) distance of the entire lens. With a relative aperture of 1: 2.5 within a field of 8 °, the resolution in the angular measure for lenses of this type is approximately 2 O seconds Z.

The purpose of the invention is to improve image quality and increase the field of view.

Claims (3)

The goal is achieved by the fact that the mirror lens is equipped with an additional concave mirror located between the plinoids and main mirrors, while its optical axis forms an acute angle with the optical axis of the main mirror, which lies within JO-15, and the optical angle & sipa its composition em 3 about, Ol - about, OO4 the magnitude of the optical power of the lens. The drawing shows the optical layout of the lens. The lens consists of an aspherical planoid mirror I of a concave spherical mirror 2 liters 3 A second spherical concave mirror 2, the shape of which corresponds to 0.010, O04 of the magnitude of the optical power of the object, established in the course between pnapoidy mirror 1 and the main spherical mirror 3, so that the angle between The axes of these c () epiFiock0x mirrors lie within. 1O - 15. The main spherical mirror 3 is rotated to the aspheric ppapdny; zer.plu 1 at an angle flL, rue, i.0, AOja-norm to the lane of the planter mirror 1., Hijack mfs-K; do so:; it falls about the if ray of the normal to the tip of the planopt aopKa / ia L. denoted 6 С п О О the radius centers are shown к., с, the incoming B object in the mirrors, and their permlnchi. seikalnaya plane sbekt1P1P 1 - F. The entrance pupil of the volume & cov.coir.emsH with a planoid mirror 1. The course of the rays in the lens S1dukl; pgg Parallel .nuyuk. Nucche with a wavefront, looking for an outcome from the udapai leg of the object, the HQ Asfierich planoid mirror -1 falls from the target, and from it a non-year-old {{keb beam is directed to the side of the concave mirror 2, the optical power of the co-mirror corresponds to 0 the lens optical power, the flocne reflected from the mirror 2 kok descent1Tmos1b (and the non-homocentrgpichnost of the beam are changed due to a drop in the beam-spherical mirror 2 at a large angle. Then this load on the main concave sphere eskoo mirror 3, focal The second distance which mainly determines the magnitude of the focal distance nz-g of the lens.After reflection from the mirror 3, a beam of rays from b is focalized in the system P, located HceHHONf near the top of O-, the mirror 2. As the rays falling (Yu - 13) are shielded by a concave core 2, then the proposed object in the meridian of the opal plane (the plane of the drawing) is determined by the difference between MRKCJT and a small angle χ x - the minimum wrinkle (,,, -; -. The maximum value of the angle is determined by the requirements of aphids, imposed on the size of the Kruhsk scattering and the magnitude of the vignetting of the beams on mirrors 2 and 3. In the meridional plane of the objective field, the angle difference was equal to 1 2 2 3, In the sagittal plane (plane, perpendicular to the drawing) the angle of the lens floor 2 d can reach 12 °. The equation for the profile of an aspherical surface 1 is asleep: Z4 9 K. GZU + VU + Su + C1 y, where a, c, c, b | the coefficients of the equation of the surface surface with the corresponding powers of the height of the zone of the SR. Calculations and demonstrations that the lens Juieet is high papevueriHG on large plo x, Taqal way., the lens can be npiDvieHoH in optico-electropi or yc ;. shi | nkogolnyh pribo ™ jf-iX, providing high resolution in the njiipCAOii spectral region. The claims of the Invention. The Z.-Rokal obotiv, containing an ac- gerchichesky pinch mirror and a main concave spherical mirror, about 31 hours and so that, for the purpose of image quality and increase in the field of view, it is equipped with The BOrHyibRvf mirror is positioned iibi .-: M9: - where papapoglpun. and ocHoanbnvi mirror, with its optical axis syravot with the optical axis of the main mirror acute thickness, lying within 10 - 15, and its optical power is 0 , 01 - 0,00 magnitude of the opposition power of the lens. Sources of information taken into account in the examination of 1. Maksutov D. D. Astronomical Optics, OGMZ, 1946, p., 281-305, 2. US patent number 3963328, CL .- 350-294, published, 1976. 3. Michelson N. I, Optical telescopes. M., Science, 1976, 281 (prototype).