SU1518686A1 - Device for determining averaged colour of object - Google Patents

Abstract

The invention relates to the field of optical measurements and can be used in calorimetry in optical measurements for the integral assessment of the chromaticity of an object. The aim of the invention is to improve the accuracy and the expansion of the field of application to the overall and remote objects. The device comprises an optical system, a scanning unit and a visual recording system. The scanning unit is made in the form of a rotating polyhedron with mirror edges installed at different angles to the axis of rotation, and with the edges shifted in the radial direction. 2 Il.

Description

The invention relates to optical measurements and can be used in colorimetry, for example, to estimate the parameters of the light-color environment in architecture, in forming the exhibition environment of museums and exhibitions, in particular when choosing the optimal background for paintings, to determine the quality of color solutions for finishing samples of complex colors used in construction.

The purpose of the invention is to reduce accuracy and extend the field of application to tobacco and remote objects.

FIG. 1 shows a power supply circuit diagram of the device; in fig. 2 - Kong 1-hand execution of multifaceted-vijii with. Scanning.

The device contains an optical system 1 with a setting mechanism 2, a scanning unit with a drive (not shown), a visual registration system 4, including uterine glass 5, a personnel window 6, a lens 7, a tube 8. System 4 can be replaced A visual colorimeter that creates two dads of comparison. Scan node 3 is designed as a polyhedron i with mirror edges. Moreover, the angle of inclination of the faces with respect to the axis of rotation of the polyhedron changes, which helps to move the image of the object by a certain distance up and down as all parts of the image pass through the control plane 9. To ensure that all the rays pass through the plane 9 of the control, it is necessary to ensure the interleaving of the mirror

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polyhedron parallel to the focal plane while maintaining the angle of the beam to each scanned poposo .. As a result, all areas of the observed object 10 are passed in equal measures through the control plane 9 or colorimeter.

The device works after the arc.

Optical system 1 transmits an image of an object 10 through a mirror face of a polyhedron on a frosted glass. When the polyhedron is rotated, the beam reflected from its face is rotated, scanning through the frame window 6 one line of the image. As each new face of the polyhedron rotates, the beam of light scans a new line to the observation zone bounded by the frame window 6. The distance between the lines is determined by the angle of inclination of the reflecting faces of the polyhedron. The magnitude of the horizontal displacement of each face is determined by focusing the image. After all faces are reflected by the light, the scanning cycle is repeated.

Oblique faces provide straight-line scan lines, paralpeller. side of the frame window. When the rotational speed is reached, eliminating the flickering of the image, a constant image of the total chromaticity is established. The resulting mixture of image elements can be measured using a visual colorimeter.

As an example in FIG. Figure 2 shows the implementation of a polyhedron with deflection angles relative to the axis of rotation -2, -oi. O, oi, 2-6, and moving the faces in the radial direction, respectively, L, a, O, -a, -b.

The number of faces of a polyhedron can be chosen to be a multiple of the number of scan bands.

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Claims (1)

Apparatus of the Invention A device for determining the average color of an object, including a rotating scanning node and a visual registration system with a control plane, which is so that, in order to improve the accuracy and extent of the field of application. on the overall and remote objects, an optical system is additionally inserted in it, located in front of the scan1-fowaning unit and forming an image of the object in the visual recording system in the control plane, and the scanning unit is designed as a polyhedron There are N mirror faces, one of the faces parallel to the axis of rotation, and each is at an angle o / (N-1) to the previous one, where / 3 is the aperture angle of the registration system, with each side face of the polyhedron shifted in the radial direction by the value determined from the condition of the constant optical path from the optical system to the plane of control. five 0 five Fig 1 -d  0