Design of Medical Optical Zoom Achromatic Endoscope Objective

Hongtao Cheng; Hengyu Li

doi:10.3788/LOP202259.2417001

Journals >Laser & Optoelectronics Progress >Volume 59 >Issue 24 >Page 2417001 > Article

Laser & Optoelectronics Progress
Vol. 59, Issue 24, 2417001 (2022)

Design of Medical Optical Zoom Achromatic Endoscope Objective

Hongtao Cheng¹ and Hengyu Li^2,*

Author Affiliations

¹Department of Development and Plan, Shanghai University of Medicine & Health Sciences, Shanghai 201318, China

²School of Mechatronic Engineering and Automation, Shanghai University, Shanghai 200444, China

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DOI: 10.3788/LOP202259.2417001 Cite this Article Set citation alerts

Hongtao Cheng, Hengyu Li. Design of Medical Optical Zoom Achromatic Endoscope Objective[J]. Laser & Optoelectronics Progress, 2022, 59(24): 2417001 Copy Citation Text

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Fig. 1. Principle of Alvarez lens

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Fig. 2. Endoscope objective based on Alvarez lens

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Lens

d

/mm

Glass

v

n

ξ

L_{1}

LAH66

49.601340

1.772499

0.2

L_{2}

TIH6

25.432057

1.805181

0.2

L_{3}

FSL5

70.210260

1.487490

0.2

Table 1. Physical parameters of optical elements

Status	m	$ϕ_{1} / m m^{- 1}$	$t_{1} / m m$	$ϕ_{2} / m m^{- 1}$	$t_{2} / m m$	$ϕ_{3} / m m^{- 1}$	$t_{3} / m m$
Wide angle	-3	0.0398	0.0644	-0.2439	-0.3786	0.0582	0.1492
Mid-zoom	-2.5	0.0362	0.0586	-0.1691	-0.2625	0.0591	0.1515
Tele-zoom	-2	0.0347	0.0561	-0.1722	-0.2673	0.0598	0.1533

Table 2. Optical and physical parameters of Alvarez lens

Status	$y_{1}$	$y_{2}$	$y_{3}$
Wide angle	1	0.9204	1.4745
Mid-zoom	1	0.9276	1.2896
Tele-zoom	1	0.9306	1.3072

Table 3. Light height value on edge axis of Alvarez zoom system

Status	Axial color
Wide angle	0.005520
Mid-zoom	0.003591
Tele-zoom	0.003709

Table 4. Axial color calculation value of Alvarez zoom system

Hongtao Cheng, Hengyu Li. Design of Medical Optical Zoom Achromatic Endoscope Objective[J]. Laser & Optoelectronics Progress, 2022, 59(24): 2417001

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