Optical Science Laboratory

Optical Science Laboratory - Specifications

USGS Aerial Camera Specifications

USGS Aerial Camera Specifications

Nominal focal length (mm)	88	153	210	305
Deviation of calibrated focal length from nominal (mm)	+/- 4	+/- 3	+/- 4	+/- 5
Minimum angular field of view (degrees)	120	90	70	50
Maximum useable field angle (degrees) Optical axis out to:	54.5	40	30	22.7
Maximum lens distortion at maximum aperture (microns) Symmetric radial	+/- 15	+/- 10	+/- 20	+/- 20
Tangential component of decentering (microns)	n/a	8	n/a	n/a
Maximum deviation of calibrated principal point/point of symmetry from principal point of autocollimation (microns)	30	15	30	30
Stereomodel flatness deviation (microns)	+/- 17	+/- 19	n/a	n/a
Minimum lens resolving power ([cycles or lp]/mm)
Angle
0	59	80	49	48
7.5	59	80	49	48
15	49	67	42	28
22.7	42	57	35	24
30	35	57	29	n/a
35	30	48	n/a	n/a
40	17	40	n/a	n/a
45	14	n/a	n/a	n/a
50	12	n/a	n/a	n/a
54.5	12	n/a	n/a	n/a

For all cameras:

Filter wedge angle <=10 seconds of arc
Film magazine platen +/- 13 microns from true plane
Film magazine platen id required
Fiducial lines of intersection: Lines connecting either opposite side or opposite corner fiducials.
- The intersection points are defined as the indicated principal points (IPPs). (See diagram)
- Fiducial angles of intersection: 90 degrees +/- 1 minute
- Maximum deviation of IPPs from principal point of autocollimation is 30 microns.
Eight fiducial marks required – no glass marks.