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Spheric long-focal-depth lens: A comment

✍ Scribed by Z. Jaroszewicz; A. Burvall; A.V. Goncharov; K. Kołacz

Book ID
104073915
Publisher
Elsevier Science
Year
2008
Tongue
English
Weight
165 KB
Volume
281
Category
Article
ISSN
0030-4018

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✦ Synopsis

We would like to refer to a publication on the lens axicon, which recently appeared in Optics Communications [1]. The authors proposed a singlet spherical lens with spherical aberration, and showed that is a good approximation of a logarithmic axicon [2][3][4]. It gives constant axial intensity along the focal segment created behind the lens, as shown by both numerical simulations and experimental results. The lens axicon fulfils all requirements for its intended application in plasma measurements.

However, we feel obliged to clarify one point: the proposed singlet lens axicon is a backward-type axicon, not a forward one as indicated in Ref. [1]. The phase distribution used in Eq. (1) of Ref.

[1] is the paraxial version of the forward annular axicon [2,3] uðrÞ ¼ À

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Spheric long-focal-depth lens
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✍ Shenglin Wen; Jingqin Su; Jun Dong; Fuhua Gao; Yongkang Guo; YiXiao Zhang 📂 Article 📅 2007 🏛 Elsevier Science 🌐 English ⚖ 312 KB

Spheric lens designed by nonlinear phase fitting method is proposed to duplicate the performance of logarithmic axicon, which can obtain a beam with long-focal-depth, small focal spot and side lobe. Moreover, the spheric lens is easier and less expensive for manufacture than logarithmic or aspherica