10 Sep Production optimization: measuring ground prisms
Möller Wedel Optical has introduced aground prism extension for the Goniomat M5/M10 goniometers. It enables the measurement of prism angles of ground and lapped prisms with a roughness Rq = 1.0 or smaller with a maximum measurement uncertainty of ten angular seconds. The achievable accuracy and measurability of the specimen depend on the size and roughness of the prism faces.
The measuring principle uses the autocollimator of the goniometer as a telescope and an external collimator for illumination. The beam path is split and the angle of incidence is optimized for the task. Thanks to the larger angle of incidence, the effect of projected roughness can be used. The surface has a higher reflective effect here, and surfaces appear smoother. Thus, the collimation image can be captured with the autocollimator or telescope and the dihedral angle of the finely ground prism can be measured.
This is not possible with conventional methods due to the process. According to the supplier, the Goniomat-M extension for ground surfaces has a high potential for saving time and costs in production and can help optimize the fine grinding process.
Source and Image: www.moeller-wedel-optical.com
