Passively athermalised hybrid Petzval objective for high resolution MWIR detector arrays

Authors: Zhang, Yi-Nan; Wang, Zhao-Qi

Source: Optik – International Journal for Light and Electron Optics, Volume 115, Number 4, July 2004 , pp. 169-172(4)

Publisher: Urban & Fischer

Buy & download fulltext article:


Price: $30.20 plus tax (Refund Policy)


To meet the requirement of extensive temperature adaptability of infrared optical systems, diffractive optics is applied to a high resolution Petzval objective in the 3–5 μm waveband and a hybrid Petzval objective, which is passively athermalised over the temperature range –20 °C to +50 °C, is designed. Only two materials Si and Ge are used. The theoretical polychromatic MTF is above 0.80 at 20 cycles/mm and near diffraction-limited; the geometrical spot diameter is controlled to within 20 μm over the range of temperature. The lens is compatible with a latest generation Middle Wave Infrared (MWIR) staring array imager with the pixel size of 25 μm. The manufacturing issues related to the diffractive surface are also described.

Document Type: Research Article


Affiliations: Institute of Modern Optics, Nankai University, The Key Laboratory of Opto-electronic Information Science and Technology, Ministry of Education, Tianjin, 300071, China

Publication date: July 1, 2004

Related content



Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content

Text size:

A | A | A | A
Share this item with others: These icons link to social bookmarking sites where readers can share and discover new web pages. print icon Print this page