What is a Goniometer?

Goniometer (goniometer) refers to a device for measuring the angle, also known as a goniometer, goniometer, goniometer, protractor, etc.

High accuracy --- Angle accuracy can reach ± 0.3 seconds

Long life --- The spindle adopts an air-floating structure, which maintains long-term accuracy, never wears, and has a long service life

Reading system uses imported high-precision phase grating encoder and related technologies

The number of engraved lines on the grating reaches 16300 lines / roundness.

The scribe line width is 0.1m. High accuracy and good stability.

The aiming system uses a collimator that detects signals with an image sensor and has high accuracy.

Spindle accuracy: ± 0.02m

Angle sensor absolute accuracy: 0.3 seconds

Single angle measurement accuracy: ± 1 second

Angle measurement accuracy: ± 0.5 seconds

CCD resolution: 0.03 seconds

CCD repeatability: ± 0.2 seconds

Bearing weight: 50kg

Contact angle measuring instrument by

1. Clean regular polyhedron, and keep the prism and prism constant temperature.

2. Adjust the instrument so that the instrument is in normal working condition and check the appearance. The instrument should work smoothly and the brightness of the field of view of the reading device should be uniform. Switch buttons should work reliably. The direction and indication of the scale of the metal dial should be the same.

3. Use a collimator to check the straightness and flatness of the work surface of the workbench.

4. Use a mandrel and a micrometer to verify the parallelism of the table and the oblique circle of the tip.

5. Indication error verification: Standard positive polyhedron and autocollimator are used as the standard. The prism is fixed on the indexing head by means of a mandrel. The dial of the instrument is at 0 °. Adjust the polyhedron to 0 ° Collimate the working surface with the autocollimator, take a reading in the indexing head reading device, and then turn the indexing head so that the dials are 30 ° 60 ° 330 ° positions. With the smallest difference.

A crystal goniometer is an instrument that measures the face angle of a crystal to study the geometry of the crystal. Commonly used are contact goniometer and reflection goniometer. The most common contact goniometer is equivalent to a protractor plus a small ruler, which is suitable for the measurement of larger crystals with a lower accuracy of only 12 °. There are two types of reflection goniometers: single-turn reflection goniometer and double-turn reflection goniometer.

The single circle reflection goniometer is mainly composed of a horizontal circle, a light pipe, a sight tube (telescope), and a switch crystal table. According to the nature of the crystal's reflection of light, the optical system is used for measurement. The accuracy is up to 1 . It is suitable for measuring small crystals with a particle diameter of about several millimeters and a flat and smooth crystal surface.

The two circle reflection goniometer has one more upright circle than the single circle reflection goniometer, allowing the crystal to rotate arbitrarily about two mutually perpendicular axes, greatly simplifying the measurement procedures, and is the main instrument for crystal measurement. A contact goniometer or a single-circle reflection goniometer measures the angle between the normals of every two crystal faces, that is, the face angle. What is measured by the double-circle reflection goniometer is a set of spherical coordinate values of each crystal plane-azimuth and polar distance, the former is equivalent to the longitude on the earth and the latter is equivalent to the latitude ^[1] . [1]