Patent ID: 11960064
Assignee: BAE SYSTEMS INFORMATION AND ELECTRONIC SYSTEMS INTEGRATION INC.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 15:
16. A MidWave InfraRed (MWIR) Wide Area Motion Imagery (WAMI) system comprising, in order, from an object to an image plane:
a fast scanning mirror providing scanning about two axes to scan the object;
a first optical group having a positive optical power configured to receive MWIR radiation from the object and provide a converged MWIR radiation, wherein first optical group comprises a first optical element having a positive optical power, a second optical element having a negative optical power and a third optical element having a positive optical power;
a first fold mirror and a second fold mirror configured to bend an optical axis of the converged MWIR radiation;
a second optical group having a positive optical power and configured to receive the converged MWIR radiation from the first fold mirror and focus the converged MWIR radiation, wherein the second optical group comprises a fourth optical element having a positive optical power, a fifth optical element having a positive optical power, a sixth optical element having a negative optical power, and a seventh optical element having a positive optical power;
A Dewar window;
An aperture stop;
a cold filter; and
a Focal Plane Array (FPA), wherein the focused converged MWIR radiation travels through the Dewar window, aperture stop, cold filter and forms an image on the FPA;
wherein the MidWave InfraRed (MWIR) system has a spectral waveband of 3.3 μm-5.1 μm.