Variable Wheel Attenuator 990-0604 is a basic model with 4 filter-set wheels. Each wheel contains 4 filter mounts each of Ø20 mm with a clear aperture of Ø18 mm.
Each filter mount is inclined by 4° to avoid retroreflections. Each wheel has 4 fixed positions. You can use any of these 4 filter positions as an optical axis. The back and front panels do not obscure. Both panels have 1″-32 threaded holes (C-Mounts). Mounting M6 hole is provided in the bottom plate.
You may order standard connecting adapters 990-0000-01, 990-0000-02 and 990-000-03 separately. Custom adapters are available.
990-0604-02 model is designed to accept 1” (25.4 mm) filters with maximum thickness of 3 mm. This model comes without filters.