Pyroelectric single-element detectors for special applications

Volkmar Norkus; Reinhard Koehler; Gerald Gerlach

doi:10.1117/12.542047

30 August 2004 Pyroelectric single-element detectors for special applications

Volkmar Norkus, Reinhard Koehler, Gerald Gerlach

Proceedings Volume 5406, Infrared Technology and Applications XXX; (2004) https://doi.org/10.1117/12.542047
Event: Defense and Security, 2004, Orlando, Florida, United States

Abstract

This paper describes the set-up and the essential features of pyroelectric single-element detectors on the basis of lithium tantalate (LiTaO₃). They have been developed for special applications in pyrometry, analytics and security techniques and are optimized for a maximum possible signal-to-noise ratio. Important detector characteristics (responsivity, specific detectivity) and of disturbances (acceleration sensitivity) as a function of the chopper frequency and the detector layout can be theoretically calculated on the basis of various mathematical and physical models. The latter take particular account of the thermal, electric, mechanical and optical conditions in the sensor. It is shown that the specific detectivity of the components can be essentially increased by using selected components (low-noise SFET, inert gas) for the detector and by applying various technologies for the manufacturing of the responsive element for certain chopper frequencies. For example, a specific detectivity of D* (500 K; 10 Hz; 1 Hz; τ_F = 1) ≥ 1.5 x 10⁹ cmHz^1/2W^-1 has been obtained for LiTaO₃ detectors with a responsive area of [3x3] mm². Moreover, the acceleration sensitivity could be reduced by choosing special chip and detector layouts. As a result, this paper confirms a good correspondence between the measured and calculated values of the detector characteristics. This paper also presents innovative detector designs (integrated optics, three-dimensionally structured LiTaO₃ chips) and their basic properties.

Citation Download Citation

Volkmar Norkus, Reinhard Koehler, and Gerald Gerlach "Pyroelectric single-element detectors for special applications", Proc. SPIE 5406, Infrared Technology and Applications XXX, (30 August 2004); https://doi.org/10.1117/12.542047

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available