2

Note:

A – Distance from object surface to lens reference plane

B – Distance from object surface to sensor reference plane

Figure 2. Distance from lens reference plane to tracking surface (Z)

Mechanical Assembly Requirements

All specifications reference Figure 2, Optical System Assembly Diagram

Parameters

Symbol

Min

Typical

Max

Unit

Conditions

Distance from Object Surface

to Lens Reference Plane

A

2.30

2.40

2.50

mm

Distance from Object Surface

to Sensor Reference Plane

B

6.77

6.87

6.97

mm

Lens Design Optical Performance Specifications

All specifications are based on the Mechanical Assembly Requirements.

Parameters

Symbol

Min

Typical

Max

Unit

Conditions

Magnification

0.72

0.8

0.88

At nominal plane.

Design Wavelength



639

nm

Design value

Object to Image Distance

8.34

8.84

9.34

mm

Lens Material Index of Refraction

N

1.580

1.582

1.584

At 639nm

Optical Depth of Field

DOF

 0.3

mm

Field Coverage Radius

0.6

mm

Design value

*

Lens material is polycarbonate or Polystyrene HH30. Cyanoacrylate based adhesives should not be used as they will cause lens material

deformation.

Sensor

Surface

Lens Reference Plane

Lens