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Flatness Measurement Using Autocollimator. Then ABC180o 2ACα 2ABβ C2Aα2 B2Aβ2 AAAα2β2180o A180oα2β23. The reflector is moved along the surface to be measured. B Flatness Machine Bed Flatness measurement Flatness measurement of a surface table require measurement of deviation from straightness in two directions. Directions can be measured by the autocollimator.
Visual autocollimators measure the angle of optically flat 14 wave or better reflective surfaces in arc seconds by viewing a graduated reticle through an eyepiece. Then ABC180o 2ACα 2ABβ C2Aα2 B2Aβ2 AAAα2β2180o A180oα2β23. Linearity of 08 within 80 field of view Effective focal lengths from 100 mm to 1000 mm. Autocollimator Measurement of 60o Prism By taking turns having angles B and C in the same position as angle A in the drawing the difference between A and C and A and B can be determined. If α is the wedge angle the angular distance between the two reflected beams is 2nα. To measure surface parallelism one simply uses an autocollimator to observe the reflections off the two surfaces of a sample and measures the angular distance between the two reflections.
Autocollimator Measurement of 60o Prism By taking turns having angles B and C in the same position as angle A in the drawing the difference between A and C and A and B can be determined.
A Laser Measuring System Fig. Visual autocollimators measure the angle of optically flat 14 wave or better reflective surfaces in arc seconds by viewing a graduated reticle through an eyepiece. B Flatness Machine Bed Flatness measurement Flatness measurement of a surface table require measurement of deviation from straightness in two directions. The longer the focal length of the visual autocollimator the greater the angular resolution and the smaller the field of view. Autocollimator is a versatile non-contact optical instrument for measurement of small angles or tilt movements with very high sensitivity. Autocollimator is an optical instrument and is used to measure angular tilts.