Motorized Closed Variable Two Wheels Attenuators 991-0702

  • Filter diameter – Ø20/Ø25.4 mm
  • Clear aperture Ø18/Ø23 mm
  • Non parallel filters (inclined by 4°)
  • Maximum thickness of filters – 4 mm
  • C -mount threads on both ends

Motorized Closed Variable Two Wheel Attenuator 991-0702 consists of two filter wheels. Each wheel contains eight filter mounts of ØD mm with clear aperture of Ød mm. Each mount is inclined by 4 degrees to prevent mutual reflections between filters.

 

We supply the attenuator 991-0702-01 with a standard, most popular, set of filters. See the table below. Alternatively, optics could be manufactured to individual orders. Or we could supply the attenuator without filters, which you can fit by yourself. You bring a filter of each wheel into the optical path easily by hand or using automation. The two wheels are driven by a single step motor. A computer can operate it via a controller and Computer Software come separately.

 

For fastening, the attenuator has clearance slots for M6 and M4 screws. There are also two M6 holes, and one M4 hole (opposite to one of the M6 holes).

 

Material: black anodized aluminium.

Delivery

Estimated delivery time: from 5 - 6 days

D, mm
d, mm
Code D, mm d, mm Price Delivery Add to cart
991-0702-01 dia 20 dia 18 1342 $ 5 - 6 days To cart
991-0702-02 dia 25.4 dia 23 1126 $ 5 - 6 days To cart
990-0000-01 - - 12 $ 5 - 6 days To cart
990-0000-02 - - 19 $ 5 - 6 days To cart
990-0000-03 - - 19 $ 5 - 6 days To cart

Note: 991-0702-01 is with filters dia 20 mm.

991-0702-02 is without filters. 991-0702-02 is suitable for Neutral Density and Colour Glass Filters dia 25.4 mm that should be ordered separately.

Delicious

Standard set filters transmittance

Wheel N1 Wheel N2
1 1
0 0
0.9 0.8
0.5 0.3
0.1 0.03
0.01 0.003
0.001 0.0003
0.0001 0.00003


Standard stepping motor specifications:

Step angle 1.8°
Step angle accuracy 5 min
Required electrical power 5.6 W
Motor 4247 (motors of other types are available)
 Weight:
       991-0702-01
       991-0702-02
0.7 kg
0.75 kg

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