Detection of people in military and security context images

Shannon, Thomas F.; Wiltshire, Ben; Spier, Emmet

doi:10.1117/2.1201408.005586

Cited by 1 publication

(4 citation statements)

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“…Therefore, the TM is configured as a sphere, and the QM is set as a conical surface. The primary aberrations are also calculated by equations (3)- (12). The detailed parameters are listed in table 3.…”

Section: Design Of Tertiary Mirror and Quaternary Mirrormentioning

confidence: 99%

“…In the first step of the optimization, proper constraints should be selected and applied [12,30,31]. The axial optical length between the SM and TM is constrained up to 370 mm to satisfy the fabrication requirement.…”

Section: Design and Optimizationmentioning

confidence: 99%

“…The spacecraft sends laser beams to and receives laser beams from its matching spacecraft via spaceborne telescopes to establish a laser link for the precise measurement of the change in the distance between the test masses. As the spacebased GW observatory consists of an equilateral triangle of three spacecraft with pairs of proof masses at the end of each arm, the six telescopes are required to play the role in enabling the mission's long arm interferometry [10,12].…”

Section: Introductionmentioning

confidence: 99%

“…Plenty of researches on the telescopes have been carried out by LISA [10,12,15]. The telescope is designed based on the Cassegrain telescope, but the on-axis or off-axis design has not been decided.…”

Section: Introductionmentioning

confidence: 99%

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High performance telescope system design for the TianQin project

Fan¹,

ZHAO²,

PENG³

et al. 2022

Class. Quantum Grav.

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China is planning to construct a new space-borne gravitational-wave (GW) observatory, the TianQin project, in which the spaceborne telescope is an important component in laser interferometry. The telescope is aimed to transmit laser beams between the spacecrafts for the measurement of the displacements between proof-masses in long arms. The telescope should have ultra-small wavefront deviation to minimize noise caused by pointing error, ultra-stable structure to minimize optical path noise caused by temperature jitter, ultra-high stray light suppression ability to eliminate background noise. In this paper, we realize a telescope system design with ultra-stable structure as well as ultra-low wavefront distortion for the space-based GW detection mission. The design requirements demand extreme control of high image quality and extraordinary stray light suppression ability. Based on the primary aberration theory, the initial structure design of the mentioned four-mirror optical system is explored. After optimization, the maximum RMS wavefront error is less than λ/300 over the full field of view (FOV), which meets the noise budget on the telescope design. The stray light noise caused by the back reflection of the telescope is also analyzed. The noise at the position of optical bench is less than 10-10 of the transmitted power, satisfying the requirements of space gravitational-wave detection. We believe that our design can be a good candidate for TianQin project, and can also be a good guide for the space telescope design in any other similar science project.

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Section: Design Of Tertiary Mirror and Quaternary Mirrormentioning

confidence: 99%

Section: Design and Optimizationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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