Current Status of the Laser Diode Array Projector Technology

This paper describes recent developments and the current status of the Laser Diode Array Projector LDAP Technology. The LDAP is a state-of-the-art dynamic infrared scene projector system capable of generating high resolution in-band infrared imagery at high frame rates. Three LDAPs are now operational at the US Army Aviation and Missile Commands AMCOM Missile Research, Development, and Engineering Center MRDEC. These projectors have been used to support multiple Hardware-in-the-Loop test entries of various seeker configurations. Seeker configurations tested include an InSb 256x256 focal-plane array FPA, an InSb 512x512 FPA, a PtSi 640x480 FPA, a PtSi 256x256 FPA, an uncooled 320x240 microbolometer FPA, and two dual field-of-view FOV seekers. Several improvements in the projector technology have been made since we last reported in 1997. The format size has been increased to 544x544, and 672x512, and it has been proven that the LDAP can be synchronized without a signal from the unit-under test UUT. The control software has been enhanced to provide point and click control for setup, calibration, image display, image capture, and data analysis. In addition, the first long-wave infrared LWIR LDAP is now operational, as well as a dual field of view LDAP which can change its FOV within 0.25 seconds. The projector is interfaced to a Silicon Graphics scene generation computer which is capable of real-time 3-D scene generation. Sample images generated with the projector and captured by an InSb FPA sensor are included in the text.