Autocollimators are optical instruments that measure angular displacements and are used to align optical components Autocollimator Principals of Operation. Due to the collimated beam (infinity adjustment) the measurement results are independent from the distance to the object under test. The operating principle is . Auto-collimator is an optical instrument used for measuring small target crossline is therefore visible through the eyepiece thus operating as.

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Many other applications require alignment of the laser beam to its optical cavity or to other optical elements. The autocollimator projects a beam of collimated light.

This effect is more severe when the distance between the two increases. An autocollimator works by projecting an image onto a target mirror and measuring the deflection of the returned image against a scale, either visually or by means of an electronic detector. Reflex Photonics is growing its portfolio of integrated test systems New approaches to alignment and lasers combined with diamond machining of intricate optical assemblies will lead to proper autocoplimator of mechanics, lasers and optics.

Micro-Radian autocollimators take advantage of the latest detector technology including advanced silicon-based photodetectors and germanium-based detectors. The instrument is so sensitive that air currents between the optical path and the target mirror can cause fluctuations in the readings obtained.

Applications are roughly divided into two fields – optical and mechanical engineering. The plane reflector is one of the vital parts of an autocollimator, because a mirror that is not flat will defocus the return image, resulting in poor definition of the image.


Micro-Radian visual autocollimators project a pinhole image.

Micro-Radian Autocollimator Principles of Operation

An external reflector reflects all or part of the beam back into the instrument where the beam is focused and detected by a photodetector. Figure 1 illustrates the working principle of an autocollimator. An autocollimator is an optical instrument that is used to measure small angles with very high sensitivity.

Applications News Features Enlightening Applications. The longer the focal length, the larger the linear displacement for a given tilt of the plane reflector. A plane mirror perpendicular to the optical axis serves the purpose of reflecting an image of the pattern back on to the observation point. This is done in most of the autocollimators by means of a simple eyepiece. The new apparatus is based on a state-of-the-art autocollimator combined with an imaging laser beam profiler.

Visual autocollimators are often used for lining up laser rod ends and checking the face parallelism of optical windows and wedges. It consists of an optical head and a bore-diameter adaptor which is inserted into the muzzle of the rifle. The L linear stage from PI strikes a balance of load capacity, Micro-Radian also offers a princciple autocollimator that uses a CCD camera in place of the eyepiece.

The optical axis workihg exactly in line with the mechanical axis of the barrel. This procedure will bring the sight to be perfectly aligned to the laser direction. Another marked advantage is that a laser autocollimator can be used for the measurement of non-mirror-quality surfaces.

In the first stage the periscope is deployed to cancel the parallax between the laser and the LAA. Figure 4 illustrates the construction details of a laser collimator. Visual Autocollimators Digital Autocollimators Digital autocollimators use an electronic photodetector to detect the reflected beam. qorking



This page was last edited on 12 Octoberat The following are some of the applications of a digital autocollimator: What is an Autocollimator?

Latest from the trade show floor. Introduction to Angular Measurement Protractor a Checking right angle prisms for angular and pyramid errors.

Because of this wogking set up, the effective autocollimator aperture for bore sighting applications will exceed mm, these effective aperture conversion is a function of the length of the periscope used. The bore sighting procedure is performed in two stages. Because the human eye is able to discern multiple images simultaneously, visual autocollimators are suitable for measuring multiple surfaces simultaneously.

Digital autocollimators use an electronic photodetector to detect the reflected beam. Development in the laser fi eld created a n eed for accurate alignment of a laser beam to its mechanical dat um.

The autocollimator is than adjusted to coincide with the laser direction by using its built in mechanical adjustment. Originally bore sighting is defined as the adjustments made to an optical scope to be aligned to the firearm barrel.

All these applications have a common trait with the original application and that is that a remote external target is necessary in order to perform the line of sights alignment. Micro-Radian laser autocollimators have autoocollimator beams autocillimator small as 1. First step, aligning of Autocollimator to the mechanical reference using a mirror. It is coherent and has a diameter of approximately 8—10 mm. The autocollimator measures the deviation between the emitted beam and the reflected beam.