Motorized Variable Two Wheels Attenuators 10MWA168 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 10MWA168-20 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. 10MWA168-1 model comes WITHOUT filters. You 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 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.

Transparency of filters Wheel 1 Wheel 2 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

Software support

- Control f single stepper motor with two wheels and up to 8 filters in every wheel
- Three different transmittance tables can be configured for different wavelengths
- Operation in transmittance and optical density modes
- Program can choose the best combination for required transmittance op optical density, or filters defined by the user can be set
- Different speed and step division options

Computer Software is designed to control motorized attenuator unit from Altechna with Altechna’s stepper motor controllers for USB or RS232 interface. Motorized attenuator together with program can be applied in all kinds of optical circuitry where variable transmittance has to be achieved. Program allows you to easily change transmittance or optical density of an attenuator 10MWA168. Just enter transmittance or optical density values, and the program will select the closest two filters. Or you can select the filters directly. The simple interface allows you to use the program right away. For each of the three different wavelengths it stores a set of filter transmittance values, which a user can modify. “Density/Transmittance” button switches between these modes at any time. All system configuration information and current state of an attenuator is stored in a file and is automatically reloaded after the program starts. All of our software works only with our controllers.

Requirements
PC with minimal Windows 95/98/ME/2000/XP installation;
Display;
Altechna’s Stepper Motor Controllers
24V/36V power supply.

	Filter diameter - Ø20/ Ø25.4mm
	Clear aperture Ø18 / Ø23 mm
	Non parallel filters (inclined by 4°)
	Maximum thickness of filters - 2 mm

Models

Model	Weight
10MWA168-1	0.65 kg
10MWA168-20	0.61 kg