DEVICE TO DISPLAY INNER SURFACE OF CAVITY IN PART Russian patent published in 2013 - IPC G01N21/954 G02B23/24 

FIELD: measurement equipment.

SUBSTANCE: device 2 for display of an inner surface 4 of a cavity in a part 6 comprises optics 8 with circular scan, which is located in the image-transmitting connection with a shooting device (10) and a processing device installed behind. The device also comprises a lighting device 16 with a source of light 18 to illuminate the displayed area of the inner surface 4 covered with the optics 8. Location of the lighting device 16 relative to the optics 8 and trajectory of its beams is selected so that the first axial section of the displayed area may be illuminated in the light field, and the second axial section of the displayed area simultaneously distant from the first axial section - in the dark field.

EFFECT: provision of the possibility to detect structural defects of surface.

15 cl, 11 dwg