[2] [2] Willamowski U, Ristau D, Welsch E. Measuring the absolute absorptance of optical laser components[J]. Appl Opt, 1998, 37(36): 8362–8370.

[3] [3] Kuo P K, Munidasa M. Single–beam interferometry of a thermal bump[J]. Appl Opt, 1990, 29(36): 5326–5331.

[4] [4] Saito H, Irikura M, Haraguchi M, et al. New type of photothermal spectroscopic technique[J]. Appl Opt, 1992, 31(12): 2047–2054.

[6] [6] Commandré M, Roche P. Characterization of optical coatings by photothermal deflection[J]. Appl Opt, 1996, 35(25): 5021–5034.

[7] [7] Wu Z L, Reichling M, Hu X Q, et al. Absorption and thermal conductivity of oxide thin films measured by photothermal displacement and reflectance methods[J]. Appl Opt, 1993, 32(28): 5660–5665.

[9] [9] Mcdonald F A, Wetsel Jr G C. Generalized theory of the photoacoustic effect[J]. J Appl Phys, 1978, 49(4): 2313–2322.

[10] [10] ISO. Optics and photonics-Lasers and laser-related equipment-Test method for absorptance of optical laser components: ISO 11551: 2019[S]. Geneva, Switzerland: ISO, 2019.

[12] [12] FLIR Systems Inc. User Manual FLIR T10xx Series[M]. State of Oregon, America, 2018.

[14] [14] Wood W L, Lewis R W. A comparison of time marching schemes for the transient heat conduction equation[J]. Int J Numer Methods Eng, 1975, 9(3): 679–689.