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Electronic Auto-collimator | Spherometers
PC-controlled Comparison Goniometer
The system includes an autocollimator mounted on a stand with a swivel arm and a collimator in the ground plate. The auto-collimator image is taken by a CCD-camera and further processed via frame grabber, PC and specific software. Measurements are made in reflection for outer prism angles and in transmission for internal deviation angles.
The PC-controlled Comparison Goniometer features high accuracy and extremely short measurement time . A prism measurement takes just the time to press a key of the PC. Being accurate, extremely fast and non-expensive, the Comparison Goniometer is perfectly suited for production environment and larger quantities of pieces.
Stand with Swivel Arm
The stand is equipped with a handwheel for convenient and quick swiveling of the arm with the autocollimator holder. On the left side a locking lever allows for fixing the autocollimator in a position nearly square to the prism surface to be checked. A disk placed in the front of the swivel axis and divided in degrees helps finding the desired angular position .
A knob placed on the right upper side of the stand enables the accurate fine adjustment with arcsec sensitivity. A second lever is used to lock the arm with the autocollimator in a stable working position.
The sample to be measured is placed on a combination tilt and rotary table with fine adjustment facilities. To accommodate different sample sizes this assembly can be adjusted in the highs and locked in the working position.
A device with interchangeable 3 ball supports of different sizes is firmly fixed on the table. The positioning of the samples on the 3 ball supports ensures the necessary repeatability. This device has in addition a mount where a mirror could be firmly mounted for measurement in transmission (double pass) of parallel plates or wedges with small angles.
In the stand base is mounted a collimator with deflection mirror at 45° for measurement of internal angle deviation through prisms (e.g. pentaprisms).
The autocollimator and collimator are interchangeable so that the required focal length or aperture can be selected according to the requirements (accuracy, field of view, eta) of the measurement.
The Comparison Goniometer can be used for angle measurements of any piano optics in production quantities with high speed and consistent accuracy:
The user-oriented software has been developed to really meet the requirements of an easy, quick and errorless measurement:
Swivel range: 0°-90° left side, 90°- 45° right side
Dimensions and weight: height: 450 mm, stand base: 350x350 mm, weight: approx. 25 kg
Tilt and rotation table: diameter 100mm, tilt ±2°, rotation 360°/±2.5°, sensitivity 5 arcsec
Measuring Range: 0° - 360°
Master prism: required (except 90° angle)
Standard equipment: ACM 300-57, COL 150-38
Resolution: 0.1 arcsec
Accuracy: +/-1 arcsec (with ACM 500)
Measurement Mode: Reflection and Transmission
On request the goniometer can be equipped with other autocollimators/collimators depending on specific applications.
Masterprisms are also available on request.
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