EVB90601 Melexis Inc, EVB90601 Datasheet - Page 33

• Manufacturer Part Number: EVB90601
• Description: EVALUATION BOARD MLX90601 IR MOD
• Manufacturer: Melexis Inc

Specifications of EVB90601

• Rohs Status: RoHS non-compliant

CHANGING THE FOV OF THE MLX90601 USING SIMPLE APERTURES
(Note: The Melexis part # EVB90601 is necessary when adding an aperture to a standard MLX90601.
Normally, a one point IR re-calibration must be performed to adapt the aperture.)
The digital signal processing of the MLX90601 allows for easy modifications to customize the module for
many applications at minimal engineering and manufacturing cost.
Example 1: Adding 3.5 mm x 4 mm Aperture
The following shows the optical effect of adding an aperture device with a 3.5 mm diameter hole, by 4 mm
length above the top of the sensor.
As you can see, this simple aperture has reduced the FOV quite considerably.
Minimum Resolution (approx.): 0.04 deg C at 25 C target temperature
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The aperture must be mounted directly onto the thermopile sensor of the MLX90601, and epoxied
into place.
They must be thermally connected, with the assembly staying isothermal under your desired
operating conditions.
The aperture must be a high thermal conductance metal.
The internal aperture must be blackened, or coated to eliminate internal reflections.
The internal aperture can be threaded to further eliminate reflections.
Black anodized aluminum with internal sharp threads makes a very good aperture assembly.
Reducing the FOV of the sensor reduces the base level temperature resolution of the module.
(When an aperture is added, the amount of energy seen by the detector is reduced. As a result,
the basic voltage output of the detector is reduced. )
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EVB90601 Configuration Board
FOV with 3.5 mm dia x 4 mm length Aperture
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Angle in Degrees
User Manual
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