Optical Measuring Instruments
Autocollimator is a versatile non-contact optical instrument for measurement of 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 multitude of applications in shop floor as well as metrology labs for precision measurements of straightness, parallelism, perpendicularity and flatness.
Autocollimator projects the image of anilluminated reticle to the object under inspection and receive the reflected image from the object. In visual autocollimators this reflected image of reticle will focus at the position of fixed reference cross wire. Shift in reflected image compared to the fixed reference cross wire represents angle. A dual axis linear stage driven micrometers carry the fixed cross wire near the eyepiece of the instrument. Operator can determine shift and hence the angle by moving the fixed cross wire and aligning it with the reflected reticle image. Graduations on the micrometer give angular measurements directly in arc seconds.
In Electronic autocollimator, the reflected image of reticle will focus on a CMOS camera. The software calculates the shift in reflected image and shows the corresponding angles in seconds, minutes or degrees.
In most cases, the object under inspection may not be having reflective surfaces. In order to carry out inspection, operator needs to fix a plane mirror on the object for reflecting the image back to the instrument. Holmarc supplies a front coated mirror along with kinematic mount as a standard accessory.
Holmarc’s autocollimator has stainless steel body and high precision optics with LED illumination. A kinematic stage with two axes tilt movements hold the instrument on horizontal plane. Different types of accessories are also provided for performing different applications. Customer can choose the required accessories from the optional accessories list.
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
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
Vertical Stand with height adjustment and 3 axis freedom for alignment
Autocollimator with Vertical Stand (Height adjustment and 3 axis freedom for alignment)
Universal stand for Aotocollimator
Tripod
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
Navigation
Get in Touch
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
Mon - Sat : 9 am to 5 pm