Aladin transmit-receive optics (TRO): the optical interface between laser, telescope and spectrometers

Herbert Mosebach; Markus Erhard; Fabrice Camus

doi:10.1117/12.625417

14 October 2005 Aladin transmit-receive optics (TRO): the optical interface between laser, telescope and spectrometers

Herbert Mosebach, Markus Erhard, Fabrice Camus

Proceedings Volume 5962, Optical Design and Engineering II; 59621Z (2005) https://doi.org/10.1117/12.625417
Event: Optical Systems Design 2005, 2005, Jena, Germany

Abstract

This paper presents the design and key technologies of the Transmit-Receive Optics (TRO) for the Aladin lidar instrument. The TRO as the central optical interface on the Aladin instrument leading the optical signals from the laser source to the emitting/receiving telescope, and vice versa, the received back scattered signals from the telescope to the spectrometers for Doppler shift evaluation. Additionally, the TRO contains a calibration branch bypassing the telescope and aims at levelling out the received signals in terms of wavelength and signal height changes due to wavelength and intensity variations of the laser. The opto-mechanical concept of the TRO consists of afocal optical groups, which are connected by parallel beams. Extreme requirements have been defined for the TRO on the end-to-end transmission (>=73 %) with an associated effective bandwidth of less than 1 nm over the 200 - 1100 nm spectral range. The achieved solution is presented in this paper. A further feature of the TRO is the use of two so-called aberration generators on the emitting and calibration branch, with which an artificial astigmatism can be realised for eye safety reasons. Its effect on astigmatism is presented. This article also addresses the effort on stray light suppression, which is of extreme importance for the TRO. Special ion plated (IP) optical coatings have been used with superior performance for the TRO, particulary on laser energy resistance and air/vacuum stability. The development of special mounting technologies of optical elements to meet the stringent WFE, stability, and stray light requirements for the TRO are described. Key words : Aeolus Satellite, ALADIN instrument, Lidar, optical design, UV optics manufacturing technologies

Citation Download Citation

Herbert Mosebach, Markus Erhard, and Fabrice Camus "Aladin transmit-receive optics (TRO): the optical interface between laser, telescope and spectrometers", Proc. SPIE 5962, Optical Design and Engineering II, 59621Z (14 October 2005); https://doi.org/10.1117/12.625417

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

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
11 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Stray light

Calibration

Spectrometers

Telescopes

Optical design

Coating

Optics manufacturing

Show All Keywords

Keywords/Phrases

Search In:

Publication Years