Laser Exposure Safety Analysis for Adaptive Optics Retinal Imaging System

Table 1. Retinal hazard spectral weight function and absorption coefficient^[13-14]
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Table 1. Retinal hazard spectral weight function and absorption coefficient^[13-14]
Wavelength /nm R(λ) C_c
700--1050 10^(700-^λ⁾^/⁵⁰⁰ 1.0
1050--1150 0.2 1.0
1150--1200 0.2×10⁰^.^02×(1150-^λ⁾ 10^0.018(^λ^-1150)
1200--1400 0.02 8+10⁰^.⁰⁴⁽^λ^-1250)

Table 2. Calculation of retinal radiance limits^[13]

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Table 2. Calculation of retinal radiance limits^[13]

Condition	α /rad	t /s	E_L /(W·m^-2·sr^-1)
	α_min≤α<α_max	t<10^-6
Basic exposure limit	α_min≤α<α_max	10^-6≤t<0.25	2×10⁴×α^-1×t⁰^.⁷⁵
	α_min≤α<α_max	t≥0.25	2.8×10⁴×α^-1
	α≥α_max	t<10^-6
Large source	α≥α_max	10^-6≤t<625×10^-6
	α≥α_max	625×10^-6 ≤t<0.25
	α≥α_max	t≥0.25	28×10⁴
	α<α_min	t<10^-6
Small source	α<α_min	10^-6≤t<0.25	1.3×10⁷×t⁰^.⁷⁵
	α<α_min	t≥0.25	1.9×10⁷

Table 3. Retinal radiance limit for repeated pulse exposure
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Table 3. Retinal radiance limit for repeated pulse exposure
α /rad Number of pulses n Exposure limit /(W·m^-2·sr^-1)
α≤α_max n<40 E_L×n^-0^.²⁵
n≥40 0.4×E_L
α_max<α≤0.1 n<625 E_L×n^-0^.²⁵
n≥625 0.2×E_L
α>0.1 E_L

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Ying Liu, Yaliang Yang, Xian Yue. Laser Exposure Safety Analysis for Adaptive Optics Retinal Imaging System[J]. Acta Optica Sinica, 2020, 40(10): 1014003

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