GETSYSTEMDATA

Retrieves most system specific data, such as effective focal length, working F/#, apodization factors, and other data not associated with any particular surface. The data is placed in one of the vector array variables (either VEC1, VEC2, VEC3, or VEC4).

Syntax:

GETSYSTEMDATA vector_expression

Discussion:

The data is stored in the specified VECn array variable. For example, if the command GETSYSTEMDATA 1 is issued, the system data will be placed in VEC1. See also SETSYSTEMPROPERTY.

The data is stored in the following format, where the first number in each line refers to the array position:

0: The number of system data values in the vector

1: Aperture Value

2: Apodization Factor

3: Apodization Type (0:none, 1:gaussian, 2:tangent)

4: Adjust Index Data To Environment setting (1 if true, 0 if false)

5: Temperature in degrees c (valid only if Use Env Data true)

6: Pressure in ATM (valid only if Use Env Data true)

7: Effective Focal Length

8: Image Space F/#

9: Object Space Numerical Aperture

10: Working F/#