Motorized Variable Two Wheels Attenuator 991-0602

  • Filter diameter - Ø20 / Ø25.4 mm
  • Clear aperture Ø18 / Ø23 mm
  • Non-parallel filters (inclined by 4°)
  • Maximum thickness of filters – 4 mm
  • Custom design available
  • Closed Motorized Variable Wheel Attenuator 991-0704 is available. Ideal for CCD-cameras.

Motorized Variable Two Wheel Attenuator 991-0602 consists of two filter wheels. Each wheel contains eight filter mounts of Ø20 mm or Ø25.4 mm with clear apertures of Ø18 mm or Ø23 mm respectively. Each mount is inclined by 4° to prevent mutual reflections between filters.

 

We supply 991-0202-01 attenuators with a standard, most popular, set of filters. See the table below. Alternatively, optics can be manufactured according to individual orders. Or we can supply the attenuators without filters, which you can fit by yourself. Bring a filter of each wheel into the optical path easily by hand or using automation. A single step motor drives the two wheels. A computer can operate the filter attenuator via a controller. Controllers are sold separately.
For fastening, 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 aliuminium.

Delivery

Estimated delivery time: from 5 - 6 days

Weight
H, mm
B, mm
hmin, mm
A, mm
I, mm
L, mm
hmax, mm
G, mm
d, mm
D, mm
Code hmax, mm B, mm H, mm Weight hmin, mm A, mm d, mm I, mm L, mm G, mm D, mm Price Delivery Add to cart
991-0602-01 97 16.5 110 0.65 kg 34 35 dia 18 37 73.5 dia 100 dia 20 1102 $ 5 - 6 days To cart
991-0602-02 99.5 20.5 115 0.61 kg 32 39 dia 23 39.5 78 dia 110 dia 25.4 886 $ 5 - 6 days To cart

Note: 991-0602-01 is with filters dia 20 mm.

991-0602 is without filters. 991-0602-02 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
Rated Current 0.4 A
Resistance 33 Ω
Inductance 52 mH
Holding torque 0.12 N·m
Motor 4247 (motors of other types are available)
 Weight:
       991-0602-01
       991-0602-02
0.61 kg
0.65 kg

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