SU1659960A1 - Device for recording and observing objects - Google Patents

Abstract

The invention relates to laser optics, namely to devices with which images of micro-objects with high magnification on the screen are obtained, and can be used in biology, medicine, geology, criminalistics, microelectronics and microscopy. The purpose of the invention is to expand the class of objects under study by reducing the power of the radiation incident on the object with a slight change in brightness and image contrast on the screen. The device contains, separated by the beam-splitting element 1, the channel for forming the illumination of the object, including the element 2 for placing the object, focusing the optical system 3, the super-emitting laser medium 4, the quarter-wave plate 5 and the feedback mirror b, and including the projection system 7 and the recorder 8. In this case, the beam-splitting element 1 is made polarization, and the element 2 for placing the object, the mirror 6 and the recorder 8 are optically coupled. Due to the quarter-wave isolation, the object illuminated by the weak linearly polarized radiation of the super-radiating laser medium 4 is protected from the powerful radiation of orthogonal polarization, which forms the image of the object on the screen. The presence of a polarizer makes it possible to analyze the active objects. 1 il. Yo

Description

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The invention relates to laser optics, namely to devices with which images of micro-objects with high magnification on the screen are obtained, and can be used in biology, medicine, geology, criminalistics, microelectronics, etc.

The purpose of the invention is to expand the class of objects under investigation by reducing the power of the radiation incident on the object with a slight change in the brightness and contrast of the image on the screen,

The drawing shows the optical layout of the proposed device.

The device contains, separated by the luminous element 1, a channel for forming an object's illumination, including an object positioning element 2, a focusing optical system 3, a super-radiating laser medium 4, a quarter-wave plate 5 and a feedback mirror 6, and an image recording and observation channel including the projection system 7 and the register 8. In this case, the light-splitting element 1 is made polarization, and the element 2 for placing the object, the mirror 6 and the recorder 8 are optically coupled.

The device works as follows.

The enhanced spontaneous emission of the super-emitting laser medium 4 is linearly polarized by the polarization beam splitter 1 and the focusing system 3 is collected on the object 2. A part of the reflected radiation again falls into the focusing optical system 3 and is amplified in the super-radiating medium 4 and forms b the image of object 2. The radiation reflected by the mirror 6 transmitted twice through the plate 5 (the polarization plane is rotated by 90 °) is amplified once again in the superradiant laser medium 4 and falls on the beam-splitting element 1, which reflects the radiation on the prescriptive system 7, which forms an image of the object on the screen 8.

Thanks to the quarter-wavelength isolation, the object is illuminated by weak linearly polarized superradiating radiation

Compiled by Editor M. KelemeshTehred M. Morg

The laser medium 4 is protected from powerful radiation of orthogonal polarization, which forms an image of the object on the screen 8. The presence of polarizer 1 also allows analyzing optically active objects, i.e. objects that can rotate the polarization plane.

Claims (1)

The device was implemented as a laboratory experimental setup, in which the polarization Glan prism was used as the beam-splitting element 1, and the Fresnel rhombus in one was used as a quarter-wave plate 4 installed either between elements 1 and 4 or between elements 4 and b. a series of experiments and television mica brand TC in another. In the experiments, a copper-based pore laser was used, operating in the superluminance mode at wavelengths of 510.6 and 578.2 nm with a pulse repetition rate of 10 kHz. Standard microobjectives were used as the focusing optical system 3, and the projection system 7 used lenses with focal lengths of several centimeters. The radius of curvature of the mirror in reverse coupling varied within 2–3 m. Claims An apparatus for recording and observing objects containing a channel for forming an object's illumination, including an object positioning element, a focusing optical system, a superradiating laser medium separated by a beam-splitting element and a feedback mirror, and a channel for recording and observing an image of an object, including a recorder, the object positioning element, a mirror and an optically coupled recorder, characterized in that to expand the class of objects under study, a quarter-wave plate installed in the illumination shaping channel between the beam-splitting element and the feedback mirror, and a projection system installed in the recording and observation channel in front of the recorder, is inserted into it, and the beam-splitting element is polarized and equipped with a 0 between the focusing system and the super-emitting laser medium. 0 five 0 five 0 five 0 five Proofreader O. Kravtsov