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Technical Information
 

Features

  • Precise, Repeatable Attenuator Calibration Steps
  • 256 Linear Steps for Precise Varying of Low Levels of Radiation
  • Control of 4 Separate Attenuators Simultaneously
  • Remote Location of Control of Attenuator

The VA Series Variable Attenuators allow the user to vary the intensity of an external light source entering an integrating sphere. Variable attenuators mount onto the port frame or port frame reducer of an integrating sphere. Labsphere offers two attachments, each consisting of a slide attenuator positioned between two port frame adapters. The VA-XXX-M is a manual attenuator. The VA-XXX-SC is a motorized variable attenuator which is operated through the VAC-1000 Variable Attenuator Control and the SC-5500 Integrating Sphere System Control System.

VA-XXX-M Variable Attenuator
The VA-XXX-M Variable Attenuator consists of a manually controlled slide attenuator. The manual variable attenuators are available in 1, 2 or 4 inch aperture sizes; the part number designation XXX denotes aperture size.
VA-XXX-SC Variable Attenuator
For more predictable and repeatable settings, the VA-XXX-SC features a motorized slide attenuator. The attenuators may be set to any of 256 steps allowing for precise control of low levels of light. The attenuators are available in 1, 2 or 4 inch aperture sizes. The VA-XXX-SC is operated through the VAC-1000 Variable Attenuator Control, and the SC-5500 Integrating Sphere System Control.
VAC-1000 VARIABLE ATTENUATOR CONTROL

The VAC-1000 Variable Attenuator Control is designed specifically to control the VA-XXX-SC motorized variable attenuators through the SC-5500 Integrating Sphere System Control. The VAC-1000 operates up to four separate VA-XXX-SC Variable Attenuators simultaneously. The front panel of the VAC-1000 features four operation indicator lights to display the actual movement time of the attenuators. A D-9 pin female connector cable connects the VAC-1000 to the motor of the variable attenuator and a DA-15 pin female connector allows for interfacing to the SC-5500 Integrating Sphere System Control.

The SC-5500 Integrating Sphere System Control can then be connected to the user's computer for precise control of up to 256 linear steps of the attenuator's slide diaphragm. This allows the user to vary the intensity of an external light source entering an integrating sphere.

SPECIFICATIONS AND ORDERING INFORMATION

Part Number

Aperture Size

Operation

VA-100-M

1 inch

Manual

VA-200-M

2 inch

Manual

VA-400-M

4 inch

Manual

VA-100-SC

1 inch

Motorized*

VA-200-SC

2 inch

Motorized*

VA-400-SC

4 inch

Motorized*


*Designed to operate with the VAC-1000 and the SC-5500 Integrating Sphere System Control

 

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