D-633 POLYGONS |
Whenever a circle or portion of a circle must be divided into very accurate equiangular parts, the optical polygon is used as the master reference; It is used for calibration of rotary tables, potentiometers and resolvers.
The Model D-633-8 polygon is very compact and lightweight, reducing to a minimum any undesirable loading. The top surface of the polygon is polished to permit autocollimation from this surface for precise positioning of the polygon axis.
Polygons are available in standard configurations of 8, 9, 12, 18, 24 and 36 facets and can be ordered with any number of facets, up to 72. |
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Specifications:
| Material: | Fused Silica | |
| Face Flatness: | λ/10 | |
| Coating: | Aluminum with protective overcoat per MIL-M-13508 | |
| Accuracy: | ±5 arc sec. See Note 1 | |
| Calibration: | Given to 1/10 arc sec of actual angle with probable error of no more than 0.5 arc sec. See Note 2 | |
| Material: | Cover: | Aluminum |
| Base: | Stainless Steel | |
| Spindle Hole Diameter: | 0.766 inch (20 mm) | |
| Spindle Mounting Base: | Flat to 0.000 050 inch and square to axis of polygon within 20 arc sec | |
| Finish: | Ivory enamel | |
| Carrying Case: | Hardwood | |
| Weight: | 1.75 lbs (0.8 kg) | |
| Shipping Weight: | 5 lbs (2.3 kg) | |
NOTE 1:Angular dimensions for normals to reflecting surfaces are held to ±5 arc seconds. Pyramid error of any face with respect to other faces does not exceed 8 arc seconds. Polygons having higher accuracies are available.
NOTE 2:Calibration sheets are included giving readings between adjoining faces and from degrees to all faces. Calibration is valid when the faces are parallel to the axis of rotation within 10 arc seconds.
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