Grinrod.len - A gradient index rod

Grinrod.len - A gradient index rod

As noted before, gradient index technology is used in many diverse applications. The system in this example is a gradient index rod that is more like a fiber than a lens. It is, however, an imaginary system, designed using OSLO without regard for actual refractive indices that can be manufactured.

The drawing above shows both on-axis and off axis beams. Note that the off-axis beam for both the upper and lower rim rays is truncated by the edge of the rod. In order for this to happen, you must turn on the Aperture check all GRIN segs general operating condition. If you don’t, the rays will be free to propagate outside the boundary defined by the aperture on the surface for with the GRIN material is defined.

*OPERATING CONDITIONS: GENERAL
   Image surface:                    3    Aperture stop:                    1
   Evaluation mode:             Afocal    Reference surface:                1
   .
   .
   Aper check all GRIN ray segs:    On    Extended-aper ray aiming mode:  Off
   Plot ray-intercepts as H-tan U: Off    XARM beam angle:          90.000000
   Source astigmatic dist:      --        Ray aiming mode:          Aplanatic
   Temperature:              20.000000    Pressure:                  1.000000

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