How to Align Transmission Flat or Sphere
Precise alignment of the transmission flat (TF) or transmission sphere (TS) is critical for obtaining accurate measurements. A misaligned TF/TS, that is any non-orthogonal tilt relative to the optical axis, will cause the returning beams to pass through the interferometer off axis. Off‐axis beams pick up retrace errors lowering measurement accuracy. This is especially important in interferometers with continuous zoom imaging systems yet not as critical in Äpre’s S‐Series interferometers.
Äpre Instrument’s step-by-step process lets you effortlessly optimize the reference element, so your interferometer can do its job like never before.
Procedures are available on line for aligning transmission flats or spheres:
- Rough Alignment of the Transmission Flat (TF)
- Fine Alignment of the Transmission Flat (TF)
- Rough Alignment of the Transmission Sphere (TS)
- Fine Alignment of the Transmission Sphere (TS)
Download a pdf file containing all these procedures.
About Äpre Instruments
Äpre Instruments believes that advancing the field of metrology can advance the field of precision optics. Their eyes are on the horizon—anticipating your and your customers’ needs for ever more advanced optics and designing the next generation of metrology equipment and reporting. Äpre manufactures interferometers and also develops and supplies interferometer software. Äpre meets today’s needs with upgrades and unmatched service, and helps you advance your capabilities for tomorrow.
To request more information or a quotation for Äpre products or service, contact IL Photonics.