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The fiber optic spectrometer AvaSpec 2048 are 2 optical benches with 75 mm focal length, developed in a symmetrical Czerny-Turner design. 
Light enters the optical bench through a standard SMA905 connector (1) and is collimated by a spherical mirror (2). A plane grating (3) diffracts the collimated light; a second spherical mirror (4) focuses the resulting diffracted light. An image of the spectrum is projected onto a 1-dimensional linear detector array (5).
The optical bench has a number of components installed inside, allowing a wide variety of different configurations, depending on the intended application. The choice of these components such as the diffraction grating, entrance slit, order sorting filter, and detector coating have a strong influence on system specifications.
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| AvaBench-75 technical data |
| Focal length |
75 mm |
| Numerical aperture |
0.07 |
| Stray light |
< 0.1 % |
| Detector |
SONY 2048 |
| Dimensions, weight |
120x91 x 21 mm, 255 gr. |
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