Abstract

An airborne sensor is developed for remote sensing on an aerial vehicle (UV). The sensor is an optical payload for an eletro-optical/infrared (EO/IR) dual band camera that combines visible and IR imaging capabilities in a compact and lightweight package. It adopts a Ritchey-Chrétien telescope for the common front end optics with several relay optics that divide and deliver EO and IR bands to a charge-coupleddevice (CCD) and an IR detector, respectively. The EO/IR camera for dual bands is mounted on a two-axis gimbal that provides stabilized imaging and precision pointing in both the along and cross-track directions. We first investigate the mechanical deformations, displacements and stress of the EO/IR camera through finite element analysis (FEA) for five cases: three gravitational effects and two thermal conditions. For investigating gravitational effects, one gravitational acceleration (1 g) is given along each of the +x, +y and +z directions. The two thermal conditions are the overall temperature change to 30℃ from 20℃ and the temperature gradient across the primary mirror pupil from -5℃ to +5℃. Optical performance, represented by the modulation transfer function (MTF), is then predicted by integrating the FEA results into optics design/analysis software. This analysis shows the IR channel can sustain imaging performance as good as designed, i.e., MTF 38% at 13 line-pairs-per-mm (lpm), with refocus capability. Similarly, the EO channel can keep the designed performance (MTF 73% at 27.3 lpm) except in the case of the overall temperature change, in which the EO channel experiences slight performance degradation (MTF 16% drop) for 20℃ overall temperate change.

© 2011 Optical Society of Korea

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References

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2010 (2)

D. Zhang, G. Ma, and H. Liu, "Aerial reconnaissance camera using optical drum and mirror rotation mechanicsm," in Proc. Systems and Control in Aeronautics and Astronautics (Harbin, China, 2010), pp. 415-418.

Y. An, C.-P. Song, R.-J. Kuang, and G. Jin, "Research on the device of non-angular vibration for opto-eltronic platform," Proc. SPIE 7659, 76590H-1-76590H-6 (2010).

2009 (1)

S. Seong, J. Yu, D. Ryu, J. Hong, J.-Y. Yoon, S.-W. Kim, J.-H. Lee, and M.-J. Shin, "Imaging and radiometric performance simulation for a new high performance dual band airborne reconnaissance camera," Proc. SPIE 7307, 730705-1-730705-11 (2009).

2008 (1)

J. H. Lee, T. S. Jang, H.-S. Yang, and S.-W. Rhee, "Optical design of a compact imaging spectrometer for STSAT3," J. Opt. Soc. Korea 12, 262-268 (2008).
[Crossref]

2007 (1)

R. A. Schowengerdt, Remote Sensing (Academic Press, USA, 2007), Chapter 1.

2005 (3)

C. Cox, S. Kishner, and R. Whittesy, "Reconnaissance payloads for responsive space," AIAA-3rd Responsive Space Conference (2005).

W. J. Smith, Modern Lens Design (McGraw-Hill, USA, 2005), Chapter 23.

ZEMAX Optical Design Program User"s Guide (ZEMAX Development Corporation, USA, 2005), Chapter 11.

2003 (1)

V. Petrushevsky, Y. Karklinsky, and A. Chernobrov, "ELOp EO/IR LOROP camera: image stabilization for dual-band whiskbroom scanning photograpy," Proc. SPIE 4820, 607-617 (2003).
[Crossref]

2002 (2)

M. Henini and M. Razeghi, Handbook of Infrared Detection Technologies (Elsevier Science Ltd., Oxford, UK, 2002), Chapter 2.

S. R. Beran, A. J. Partynski, A. M. Baker, and J. Jones, "Cassegrain optical system for framing aerial reconnaissance camera," US patent 6374047 (2002).

1998 (1)

T. Sasak, M. Shinkai, K. Higashiyama, F. Tanaka, and T. Kishinami, "Development of statistical tolerancing system for optical product - virtual PT system and mass product simulation," Proc. SPIE 3482, 528-537 (1998).
[Crossref]

1992 (1)

M. Stanton, W. C. Phillips, Y. Li, and K. Kalata, "The detective quantum efficiency of CCD and vidicon-based detectors for X-ray crystallographic applications," J. Appl. Cryst. 25, 638-645 (1992).
[Crossref]

1990 (1)

N. Roddier, "Atmospheric wavefront simulation and Zernike polynomials," Proc. SPIE 1237, 668-679 (1990).
[Crossref]

1976 (1)

AIAA-3rd Responsive Space Conference (1)

C. Cox, S. Kishner, and R. Whittesy, "Reconnaissance payloads for responsive space," AIAA-3rd Responsive Space Conference (2005).

J. Appl. Cryst. (1)

M. Stanton, W. C. Phillips, Y. Li, and K. Kalata, "The detective quantum efficiency of CCD and vidicon-based detectors for X-ray crystallographic applications," J. Appl. Cryst. 25, 638-645 (1992).
[Crossref]

J. Opt. Soc. Am. (1)

Journal of the Optical Society of Korea (1)

J. H. Lee, T. S. Jang, H.-S. Yang, and S.-W. Rhee, "Optical design of a compact imaging spectrometer for STSAT3," J. Opt. Soc. Korea 12, 262-268 (2008).
[Crossref]

Proc. SPIE (5)

N. Roddier, "Atmospheric wavefront simulation and Zernike polynomials," Proc. SPIE 1237, 668-679 (1990).
[Crossref]

T. Sasak, M. Shinkai, K. Higashiyama, F. Tanaka, and T. Kishinami, "Development of statistical tolerancing system for optical product - virtual PT system and mass product simulation," Proc. SPIE 3482, 528-537 (1998).
[Crossref]

V. Petrushevsky, Y. Karklinsky, and A. Chernobrov, "ELOp EO/IR LOROP camera: image stabilization for dual-band whiskbroom scanning photograpy," Proc. SPIE 4820, 607-617 (2003).
[Crossref]

S. Seong, J. Yu, D. Ryu, J. Hong, J.-Y. Yoon, S.-W. Kim, J.-H. Lee, and M.-J. Shin, "Imaging and radiometric performance simulation for a new high performance dual band airborne reconnaissance camera," Proc. SPIE 7307, 730705-1-730705-11 (2009).

Y. An, C.-P. Song, R.-J. Kuang, and G. Jin, "Research on the device of non-angular vibration for opto-eltronic platform," Proc. SPIE 7659, 76590H-1-76590H-6 (2010).

Proc. Systems and Control in Aeronautics and Astronautics (1)

D. Zhang, G. Ma, and H. Liu, "Aerial reconnaissance camera using optical drum and mirror rotation mechanicsm," in Proc. Systems and Control in Aeronautics and Astronautics (Harbin, China, 2010), pp. 415-418.

Other (8)

R. A. Schowengerdt, Remote Sensing (Academic Press, USA, 2007), Chapter 1.

http://www.e2v.com.

http://www.sofradir.com.

M. Henini and M. Razeghi, Handbook of Infrared Detection Technologies (Elsevier Science Ltd., Oxford, UK, 2002), Chapter 2.

S. R. Beran, A. J. Partynski, A. M. Baker, and J. Jones, "Cassegrain optical system for framing aerial reconnaissance camera," US patent 6374047 (2002).

http://www.zemax.com.

ZEMAX Optical Design Program User"s Guide (ZEMAX Development Corporation, USA, 2005), Chapter 11.

W. J. Smith, Modern Lens Design (McGraw-Hill, USA, 2005), Chapter 23.

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