Optical instruments · Jena
Est. MMXIX
Instruments that bend light on purpose.
Vitrea grinds optical instruments for research and for people who still measure light by hand. Every surface is figured, tested and signed in Jena.
BK7 · N-SF11 · λ/50
Vision
Light is the only material we shape.
The instruments
Three, made by hand
- VTM-085
Meniscus f/2
Plano-convex objective
A fast meniscus objective figured to a quarter wave. Ground from BK7, edge-blackened, single-layer magnesium-fluoride coated for a flat photopic response.
- Focal length
- 85 mm
- Aperture
- f/2.0
- Glass
- BK7
- Coating
- MgF2
- VTP-007
Prism 7 degrees
Dispersive wedge
A shallow dispersive wedge in N-SF11. The seven-degree apex splits a collimated beam into a clean, ordered spectrum without folding the optical path.
- Apex angle
- 7 deg
- Glass
- N-SF11
- Index (nd)
- 1.785
- Abbe (Vd)
- 25.7
- VTE-030
Etalon
Fabry-Perot reference
A hand-contacted air-spaced etalon for spectral calibration. Two flats held parallel to a fraction of a fringe give a narrow, repeatable transmission comb.
- Finesse
- 30
- Free spectral range
- 0.5 nm
- Flatness
- lambda/50
- Spacing
- air, contacted
The bench
One bench, one axis. Light leaves the source, meets figured glass, and lands on the sensor with the dispersion we asked for.
lambda/0
Surface figure
peak to valley
0 nm
Wavefront error
RMS on axis
0
Instruments a year
ground by hand
Workshop
Ground in Jena.
Vitrea is a two-bench workshop in Jena, the city where optical glass was first made to a specification. We figure, coat and test every instrument in the same room it was designed in.
We do not sell volume. We sell surfaces you can trust to a fraction of a wavelength, delivered with the interferogram that proves it.
- Founded
- 2019
- Location
- Jena, DE
- Benches
- 2