Site Overlay


To measure straightness of a beam with the use of Auto-Collimator. – To identify the principle of Auto-Collimator device. – To be able to draw conclusions about. Auto-collimator is an optical instrument used for measuring small angular differences. Relevant for: Autocollimator The autocollimator combines both optical tools, the collimator and the telescope into Operating principle of the autocollimator.

Author: Sasida Zulujar
Country: Pakistan
Language: English (Spanish)
Genre: Literature
Published (Last): 5 August 2017
Pages: 170
PDF File Size: 5.23 Mb
ePub File Size: 13.52 Mb
ISBN: 353-2-51310-188-2
Downloads: 36441
Price: Free* [*Free Regsitration Required]
Uploader: Galmaran

Measurement of non-parallelism in windows, laser rod ends, and optical wedges by the two-face reflection method. Illuminating Products CES Alignment is achieved by new techniques involving special state-of-the-art electronic autocollimator and new las er straightness measurements. Applications News Features Enlightening Applications. The collimator is often used as a test chart projector for the inspection of infinity corrected objective lenses, e.

Similar to collimators, the telescopes can be focused at finite distances. As such, the autocollimator has a wide variety of applications including precision alignment, detection of angular movement, verification of angle standards, and angular monitoring over long periods.


The bore sighting procedure is performed in two stages. This procedure will ensure perfect alignment between the mechanical interface to its optical means. Focusing Collimator Finite distance setting Virtual image. Because the human eye is able to discern multiple images simultaneously, visual autocollimators are suitable for measuring multiple surfaces simultaneously. An electronic autocollimator is typically calibrated to read the actual mirror angle.

Retrieved from ” https: The image of the reticle is real and projected at a finite distance. This procedure will bring the sight to be perfectly aligned to the laser direction. The alignment between lasers, vision systems, optics and state of the art mechanics becomes critical for high-quality products that are produced by these systems. The autocollimation effect and name is derived from the fact that the same telescopic lens is used to project the image and collect its back reflection from a mirror element.

For measurement purposes usually a graduated reticle is located in the image plane. Autocollimators are high-precision instruments for measurement of angular reflections. The autocollimator projects a beam of collimated light. The next two schematic drawings outline two applications: Digital autocollimators use an electronic photodetector to detect the reflected beam. An autocollimator is an optical instrument for non-contact measurement of angles.


Micro-Radian Autocollimator Principles of Operation

Because the autocollimator uses light to measure angles, it never comes into contact with the test surface. Thus, the sample angle is directly proportional to the measured shift in the image plane small angles assumed. This combination with some addit ional optics will be very useful for bore sighting application between an optical sight and laser systems. Because the human eye acts as the photodetector, resolution will vary among operators. A device called a bore-sighter or collimator is used to accomplish this.

Originally bore sighting is defined as the adjustments made to an optical scope to be aligned to the firearm barrel. These specialized instruments are designed for measuring small test parts including silicon components, miniature mirrors and lenses, and fiber optic components. The PC assisted measurement guarantees much higher resolution, accuracy and repeatability of the results compared to the visual inspection, since it does not depend on the operators experience and attention.

Micro-Radian designs and manufactures all of its autocollimators and is very capable of making modifications to existing instruments to suit customer requirements. Typically, the servo-version of the T40 or T30 optical heads are selected because of their compact, lightweight size and wide field of view. Applications are roughly divided into two fields – optical and mechanical engineering.

From Wikipedia, the free encyclopedia. This setup allows alignment of lasers to its mechanical axis or external sights without the need of an external target with high accuracy and reliability.

This makes them ideal alignment instruments in applications like aligning laser rod ends or checking parallelism among optics. Optical devices Optical metrology Measuring instruments. Because of the laws of reflection that double the angle of the back reflected beams, autocollimators are calibrated to show half the angle of the total incoming beam deviation.

Principles of Operation The autocollimator projects a beam of collimated light. Typically, people can resolve from 3 to 5 arc-seconds. Moving the reticle away from objective lens will result in a convergent beam.

  ASTM D1929 PDF

A special interest is autockllimator alignment of two or more line of sights, one from a laser source and the second from one or more cameras with a significant parallax distance between the devices. An autocollimator works by projecting an princople onto a target mirror and measuring the deflection of the returned image against a scale, either visually or by means of an electronic detector. Servo autocollimators are specialized compact forms of electronic autocollimators that are used in high-speed servo-feedback loops for stable-platform applications.

Micro-Radian also offers a visual autocollimator that uses a CCD auttocollimator in pfinciple of the eyepiece. Then the periscope will be mounted to cancel the parallax between the laser and the LAA, allowing adjustment of the laser to the Autocollimator and than in a similar way as previously explained adjust the sight to the LAA. Depending on the location of the reticle relatively to the focal plane, it results a real or a virtual image at a finite distance. Latest from the trade show floor.

The development and implementation of state-of-the-art measuring instrumentation that combine laser analyzing and traditional optics allow for a significant advancement in the area of target-less bore-sighting and accurate alignment. Measurement of squareness of an outside corner by aperture sharing. A small angular offset between the two can also can be easily achieved. Light Beams Most Read. Critical Link, a provider of embedded electronics solutions, The telescope is princi;le optical tool that images an object at a far distance – usually prrinciple to infinity – into the image plane of the objective lens.

The autocollimator combines both optical tools, the collimator and the telescope into one instrument using a single objective lens.

The image is then magnified and visually inspected by an eyepiece.