- Subject
- Optical instruments
- Item type
- Object
- Provenance
- Purchased from the Quekett Microscopical Club
- Primary inscriptions
- None
- Dimensions
- Diameter: 60mm Height: 71mm Width: 60mm Depth: 16mm Weight: 123g
- Inventory No
- 36863
- Accession Number
- 1965-21
Description
Lens gauge calibrated in dioptric. Features a gauge with rotating hand, similar to a clock face. Device measures curvature of both concave and convex lenses. Formulas for determination of curvature and focal length scratched onto the back. Gauge has a ring attached to its top edge.
