Metrology Instruments
Autocollimator is a versatile non-contact optical instrument for measuring small angles or tilt movements with very high sensitivity. Holmarc manufactures precision Visual autocollimators as well as electronics autocollimators as standard products and these instruments find a multitude of applications in shop floors as well as metrology labs for precision measurements of straightness, parallelism, perpendicularity and flatness.
Autocollimator projects the image of an illuminated reticle to the object under inspection and receive the reflected image from the object. This reflected image of reticle will focus at the position of a fixed reference cross wire on the eyepiece. Shift in reflected image compared to the fixed reference cross wire represents angle. A dual axis, micrometer driven linear stage helps the fixed cross wire to align it with the reflected reticle image. The shift in the reflected image can be determined by moving the fixed cross wire. Graduations on the micrometer give angular measurements directly in arc seconds.
Holmarc’s autocollimator consists of a stainless steel body, high precision optics with Green LED illumination, and a 10X/20X eyepeice. In most cases, the object under inspection may not have reflective surfaces. In order to carry out the inspection, the operator needs to fix a plane mirror on the object to reflect the image back to the instrument. Holmarc supplies a mounted front coated mirror as a standard accessory.
1. Pitch and yaw measurement using Autocollimator
2. Squareness measurement between a vertical spindle and a machine bed
3. Parallelism measurement of cylindrical bore holes
Applications in Mechanical Engineering / Tool Room
Measurement of parallelism of two surfaces
Measurement of perpendicularity of two surfaces
Parallel setting of rolls
Pitch and yaw measurement of slides
Measurement of roll-angle
Straightness Measurement
Flatness Measurement
Squareness measurement between a vertical spindle and a machine bed
Parallelism measurement of cylindrical bore holes
Testing of accuracy of rotary tables and index tables
Vertical Stand with height adjustment and 3 axis freedom for alignment
Tripod
Applications in Optical Engineering / Optical Industry
1. Testing of parallelism with Collimator and Telescope
2. Testing of opaque wedges and plane parallel plates
3. Testing of transparent wedges - evaluation by double cross
4. Testing of transparent wedges - evaluation by reference mirror
5. Testing of transparent wedges - simultaneous determination of wedge angle and refractive index
6. Testing of transparent wedges - evaluation by angular deviation
7. Testing of the 90° angle of a 90° - glass prism
8. Testing 45° angles of 90° - glass prism
9. Relative measurement of angular error of prisms
10. Testing of camera objectives
11. Radius measurement of concave spherical surfaces
12. Radius measurement of convex spherical surfaces
13. Measurement of focal length of lenses and optical systems
14. Measurement of back focal lengths of lenses & optical systems
15. Measurement of the centration error of spherical surfaces
16. Measurement of centration error of lenses in transmission using Collimator and Telescope
17. Measurement of centration error of lenses in transmission using Autocollimator and Mirror
18. Flatness testing of reflecting surfaces using collimator & telescope
19. Flatness testing of reflecting surfaces using an Autocollimator
20. Control of wedges and plane parallel plates
Established in 1993, Holmarc Opto-Mechatronics Ltd manufactures variety of scientific and engineering instruments for research, industry and education.
ISO 9001:2015 Made in INDIA
CIN : L33125KL1993PLC006984
GST No : 32AAACH9492C1ZQ
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B.7., H.M.T. Industrial Estate
H.M.T. P.O, Kalamassery, Kochi
Kerala, India - 683 503
+91 920-719-7772 / 6 / 1
sales@holmarc.com
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