Aberration analysis of AOTF-based spectral imaging systems

Alexander Machikhin; Vladislav Batshev; Vitold Pozhar

doi:10.1364/JOSAA.34.001109

Journal of the Optical Society of America A
Vol. 34,
Issue 7,
pp. 1109-1113
(2017)
•https://doi.org/10.1364/JOSAA.34.001109

Aberration analysis of AOTF-based spectral imaging systems

Alexander Machikhin, Vladislav Batshev, and Vitold Pozhar

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Alexander Machikhin, Vladislav Batshev, and Vitold Pozhar, "Aberration analysis of AOTF-based spectral imaging systems," J. Opt. Soc. Am. A 34, 1109-1113 (2017)

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Abstract

Image aberrations caused by acousto-optic (AO) anisotropic diffraction in uniaxial crystals are discussed. For their analysis, we propose a simplified ray-tracing model of an AO crystal cell (AOC). With this approach, one can assign any configuration of AO interaction, any material and geometry of the crystal, and then estimate all conventional ray aberrations, such as spherical, coma, astigmatism, distortion, etc. The optimization procedure is demonstrated by the aberration analysis of three principal spectral imaging schemes based on AO tunable filters (AOTFs). The approach developed promises performance improvement of AOTF-based systems for high-quality spectral imaging and image processing.

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Corrections

13 July 2017: A correction was made to the funding section.

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		I	II		III
Aberrations		Collimating	Confocal		Focusing
$A_{1}$	(Chromatic drift)	$β$ [11] or second AOC [15]	–	[13]	Prism [11]
$A_{2}$	(Chromatic shift)	–	?	[12]	?
$A_{3}$	(Distortion)	Second AOC [15]	–	[13]	Second AOC
$A_{4}$	(Astigmatism)	–	$B$	[13]	?
$A_{5}$	(Field curvature)	–	$χ$	[13]	$β$ or $χ$
$A_{6}$	(Transverse aberrations^a)	–	–	[13]	?

	I		II		III
	Collimating		Confocal		Focusing
	Opt1	Opt2	Opt3	Opt4	Opt5	Opt6
$w_{1}$	0.1	0.9	0	0	0.2	0.1
$w_{2}$	0	0	0.25	0	0	0
$w_{3}$	0.9	0.1	0	0	0.2	0.8
$w_{4}$	0	0	0.25	0.8	0.3	0
$w_{5}$	0	0	0.25	0.1	0.1	0.1
$w_{6}$	0	0	0.25	0.1	0.2	0

		I			II			III
		Collimating			Confocal			Focusing
		Init	Opt1	Opt2	Init	Opt3	Opt4	Init	Opt5	Opt6
$β$	deg	90	87.7	85.9	90	91.7	91.7	90	92.8	95.5
$χ$	deg	90	90	90	90	89.5	89.5	90	91.5	96
$A_{1}$	%	11	5.5	0.04	0	0	0	1.5	0.6	1.3
$A_{2}$	mm	0	0	0	0.25	0.25	0.25	0.25	0.25	0.25
$A_{3}$	%	12	10.7	11.5	0	0	0	2.0	1.9	0.3
$A_{4}$	mm	0	0	0	0.01	0.003	0.003	1.8	1.8	2.1
$A_{5}$	deg	0	0	0	1.3	0	0	1.1	0	0
$A_{6}$ ^a	mm	0	0	0	0.01	0.01	0.01	0.05	0.05	0.08
${MF}_{in}$			0.112	0.121		0.164	0.030		0.071	0.017
${MF}_{opt}$			0.103	0.036		0.058	0.006		0.064	0.008

		I	II		III
Aberrations		Collimating	Confocal		Focusing
$A_{1}$	(Chromatic drift)	$β$ [11] or second AOC [15]	–	[13]	Prism [11]
$A_{2}$	(Chromatic shift)	–	?	[12]	?
$A_{3}$	(Distortion)	Second AOC [15]	–	[13]	Second AOC
$A_{4}$	(Astigmatism)	–	$B$	[13]	?
$A_{5}$	(Field curvature)	–	$χ$	[13]	$β$ or $χ$
$A_{6}$	(Transverse aberrations^a)	–	–	[13]	?

	I		II		III
	Collimating		Confocal		Focusing
	Opt1	Opt2	Opt3	Opt4	Opt5	Opt6
$w_{1}$	0.1	0.9	0	0	0.2	0.1
$w_{2}$	0	0	0.25	0	0	0
$w_{3}$	0.9	0.1	0	0	0.2	0.8
$w_{4}$	0	0	0.25	0.8	0.3	0
$w_{5}$	0	0	0.25	0.1	0.1	0.1
$w_{6}$	0	0	0.25	0.1	0.2	0

Aberration analysis of AOTF-based spectral imaging systems

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Journal of the Optical Society of America A