System Use and Description

The EOI LDS series of differential temperature sources create precise, adjustable thermal contrast patterns primarily in testing and characterization of IR imaging systems.

The LDS Series features set point resolution of 0.001°C and stability of ±0.001°C. These exceptional capabilities enable accurate evaluation of the most sensitive IR systems.

Configuration

These sources are available in stand alone configuration or integrated into one of the many Target Projectors/Simulators and Automatic Test Stations EOI offers. Source sizes (target area with 15°FOV) range from 1.8" x 1.8" to 12" x 12".

The optional MicroCavity^® emitting surface provides a significant improvement in effective emissivity. 

Controller 

Each Laboratory Differential Source is supplied with a 19" rack mount digital controller. Operated manually from the front panel keypad or automatically using any of the four built in computer interfaces, this versatile controller also controls all optional equipment.

Menu Selections Include:

• Temperature Setting
• Control Mode Set
  -  Differential Mode
  -  Absolute
  -  Differential Mode
  -  Effective Differential
• Display Resolution
• K, °C, °F
• Remote/Local Control
• Ready Window Tolerance
• Interface Parameters
• Power On Configuration
• Self Test
• Calibration:
  -  Access by User Assigned Password

Differential Temperature Mode

Temperature control of the thermal contrast between controlled surface (source) and target.

Absolute Temperature Mode

Control of source at absolute temperatures.

Effective Differential Mode

Compensation for emissivity differences or losses in adjunct optical systems so that zero differential temperature corresponds to zero radiometric contrast.

Computer Interfaces

Complete computerized control of the system is available through built-in interfaces.

• IEEE 488
• RS-232
• RS-422
• RS-485 

All four interfaces are resident in controller. The IEEE 488 and any one of the RS formats may be used at the same time.

Calibration 

Each LDS100 System is calibrated at EOI prior to shipment. Recommended calibration cycle is 6 months. Calibration is traceable to . Calibration tables are stored in memory and are easily updated via the front panel keypad.

Targets

An extensive list of standard four bar, slit and circular targets is available. EOI also supplies custom targets. Custom targets can be any pattern with minimum dimension of 0.001" (0.025mm).