SU516904A1 - Device for monitoring the profile of concave optical surfaces - Google Patents

Description

(54) D / 1H DEVICE FOR CONTROL PROFILE OF CONSCIOUS OPTICAL SURFACES

The najjaMUTpb beams 9, 10 of the beams, given by vam1; 1e by block 8, determine the amplitudes of the video pulses on En, 1 of the telecamera 2, corresponding to these beams.

As these parameters can be used, for example, the intensity of the light flux or wavelength.

Mask 3 is made in the form of a flat opaque body, for example, a disk with two triangular ruled rasters 17 and 18 containing alternating transparent strips 19 and opaque strips 2O

The device works as follows.

The light from source 7 enters block 8, which forms two beams 9 and 10 of the rays and sets their parameters, i.e., provides these beams with labels in the form of specified parameters. Next, the beams 9, 1O of the rays through the optical elements fall on the controlled surface of the product 6.i, reflected from it, fall on the photocathode of the camera 2 through rasters 17 and 18 in the form of two output –controlled beams 21 to 22 rays. In this case, the light indices 23 and 24 are placed in the plane of the photo of the camera 2 of the camera perpendicular to the stripes 19, 20 of the rasters 17 and 18 symmetrically relative to the optical axis 25 of the aberrometer 1 When reading the light indices 23,

24, camera 2 at its output appears a sequence of video pulses whose amplitude is determined by the parameters of the beams 9, 1 of the rays given by block 8. The number of video pulses of one new amplitude determines the length of the light} - index. The determinant 5 signals the sign of the deviation of the monitored profile of the product 6 by the amplitude of the video pulses at the output of the camera 2 and the time of their appearance relative to the sweep moment of the television reference line that intersects with the 2.5 optical axis of the aberrometer 1. rays, in ts before the sweep time of the reference line when the frame sweep is not directed from top to bottom, this means that the light index 23 corresponding to the beam 9 is above the optical axis 25. s light indices corresponding to beams 9 and 10 above or below the optical axis 25 determines the sign of the controlled deflection profile. The sign signal generated by determinant 5 and the video pulses arising at the output of camera 2 are fed to computing unit 4. Block 4 determines the average light length. by calculating the video pulses, taking into account the sign coming from determinant 5, it calculates the profile error by the obtained length. at each position of pentaprism 13, 14 and controls the actuator 16 for moving pentaprism 13, 14. In addition, unit 4 generates the necessary camera control signals. 2 and determinant 5.

Claims (1)

Invention Formula A device for monitoring a profile of concave optical surfaces, containing an autocollimation aberrometer with an illuminator and a drive, receiving and recording television device with an image analyzer in the form of two triangular rupture solutions, a television camera and a computing unit at the output, o. This means that, in order to increase the control accuracy, the illuminator is equipped with a shaper of two, for example, different amplitudes of the control beams, rays, and the analyzer of the sign of the controlled profile is inserted between the camera and the computing unit. Thebes, 1 Fig 2