Design and Optimization of Diffractive Multifocal Intraocular Lenses

Bo Dong; Ying Yang; Changxi Xue

doi:10.3788/AOS230610

Acta Optica Sinica, Volume. 43, Issue 19, 1905003(2023)

Design and Optimization of Diffractive Multifocal Intraocular Lenses

Bo Dong^1,2, Ying Yang^1,2, and Changxi Xue^1,2、*

Author Affiliations

¹School of Optoelectronic Engineering, Changchun University of Science and Technology, Changchun 130022, Jilin , China

²Key Laboratory of Advanced Optical System Design and Manufacturing Technology of Universities of Jilin Province, Changchun University of Science and Technology, Changchun 130022, Jilin , China

show less

Abstract Get PDF(in Chinese)

Figures & Tables(10)

$Multifocal diffractive optical element (DOE) design. (a) Diffraction efficiency distributions at three focal points (red: m=0; green: m=1; blue: m=2); (b) overall diffraction efficiency distribution; (c) a step height distribution of sub-region DOE$

Fig. 1. Multifocal diffractive optical element (DOE) design. (a) Diffraction efficiency distributions at three focal points (red: m=0; green: m=1; blue: m=2); (b) overall diffraction efficiency distribution; (c) a step height distribution of sub-region DOE

Download full size

Fig. 2. Experimental simulation of IOL. (a) 3D image of IOL; (b) MTF comparison

Download full size

Fig. 3. Design process

Download full size

$Analysis of effect of aspheric substrate on diffraction performance$

Fig. 4. Analysis of effect of aspheric substrate on diffraction performance

Download full size

Fig. 5. Partial magnification of Fig. 4

Download full size

$Analysis of effect of substrate diopter and aspheric synthetic factor on diffraction efficiency at different diffraction orders. (a) m=0; (b) m=1; (c) m=2$

Fig. 6. Analysis of effect of substrate diopter and aspheric synthetic factor on diffraction efficiency at different diffraction orders. (a) m=0; (b) m=1; (c) m=2

Download full size

$Comparison of theoretical diffraction efficiency (TDE), actual diffraction efficiency (ADE), and optimized actual diffraction efficiency (ADEopt)$

Fig. 7. Comparison of theoretical diffraction efficiency (TDE), actual diffraction efficiency (ADE), and optimized actual diffraction efficiency (ADE_opt)

Download full size

Table 1. Design parameters and results of diffraction structure

View table

Table 1. Design parameters and results of diffraction structure

Parameter

Experimental value

Design wavelength /nm

Addition diopters D

Cut-off point w₁

Phase delay β₁（λ）

Phase delay β₂（λ）

Result of diffraction efficiency

555

3.33

0.58

0.8

1.3

m=0：0.2685

m=1：0.3597

m=2：0.2223

Table 2. Liou-Brennan human eye model

View table

Table 2. Liou-Brennan human eye model

Surface type

Radius /mm

Thickness /mm

Refractive index

Conic

Standard

7.77

0.50

1.376

-

0.18

Standard

Gradient

Standard

6.40

Infinity

12.40

Infinity

$-$ 8.10

$-$ 12

3.16

1.59

2.43

16.27

—

1.336

Grad 1

Grad 2

1.336

—

$-$ 0.60

$-$ 0.94

0.96

Table 3. Design parameters of IOL implanted into human eye
View table
Table 3. Design parameters of IOL implanted into human eye
Design parameter Numerical value
Diopters of front surface D
Thickness /mm
Semi-diameter /mm
Conic of front surface
Fourth-order aspheric coefficient of front surface
13
1.1
3
$-$ 5.4545
3.6381×10^-4