[1] [1] HASS G, HUMER W R,TOUSEY R. Influence of purity, substrate temperature, and aging conditions on the extreme ultraviolet reflectance of evaporated aluminum［J］. Optical Society of America, 1957,47(12): 1070-1073.

[2] [2] HUTCHESON E T,HASS G,CO J T. Effect of deposition rate and substrate temperature on the vacuum ultraviolet reflectance of MgF2- and LiF-overcoated aluminum mirrors［J］. Applied Optics, 1972,11(10): 2245-2248.

[3] [3] BERNING P H,HASS G,MADDEN R P. Reflectance increasing coatings for the vacuum ultraviolet and their applications［J］. Optical Society of America, 1960,50(6): 586-597.

[4] [4] MADDEN R P, CANFIELD L R,HASS G. On the vacuum-ultraviolet reflectance of evaporated aluminum before and during oxidation［J］. Optical Society of America, 1963,53(5): 620-625.

[5] [5] CANFIELD L R,HASS G,WAYLONIS J E. Further studies on MgF2-overcoated aluminum mirrors with highest reflectance in the vacuum ultraviolet［J］. Applied Optics, 1966,5(1): 45-50.

[6] [6] HUNTER W R, OSANTOWSKI J F,HASS G. Reflectance of aluminum overcoated with MgF2, and LiF in the wavelength, region from 1 600 A to 300 A at various angles of incidence［J］. Applied Optics, 1971,10(3): 540-544.

[7] [7] HUTCHESON J T, COX G, HUNTER W R. Monitoring the thickness of thin MgF2 and LiF films on Al by reflectance measurements using the 1216-A line of hydrogen［J］. Applied Optics, 1972,11(7): 1590-1593.

[8] [8] QUIJADA M, AHENRY R M, MADISON T,et al.. Post-flight reflectance of COSTAR and WF/PC2 pickoff mirrors upon their return from space［J］. SPIE, 2010,7739: 77392J-1-10.

[9] [9] LARRUQUERT J I,MENDEZ J A,AZNAREZ J A. Far-UV reflectance of UHV-prepared Al films and its degradation after exposure to O2［J］. Applied Optics, 1994,33(6): 3518-3522.

[10] [10] KOMOR P M,GERNHAUSER R,WIESER J,et al.. Experience with the UHV box coater and the evaporation procedure for VUV reflective coatings on the HADES RICH mirror［J］. Nuclear Instruments and Methods in Physics Research A, 1999,438: 152-162.

[11] [11] KOMOR P M,FRIESE J,GEMHAUSER R, et al.. VUV reflective coatings on thin concave float glass substrates with a perimeter of 86 cm to be used as provisional HADES RICH mirror segments［J］. Nuclear Instruments and Methods in Physics Research A, 2002,480: 65-70.

[12] [12] QUIJADA M A,RICE S,MENTZELL E. Enhanced MgF2 and LiF over-coated Al mirrors for FUV space astronomy［J］. SPIE, 2012,8450: 84502H1-10.

[13] [13] LI ZH G, LI F T. Spectral characteristics of Al+MgF2 films used as beam-splitter in vacuum ultraviolet Fourier transform spectrometers［J］. Vacuum Science and Technology, 1999,19(5): 326-330.(in Chinese)

[14] [14] LIU Y, LI F T. MgF2-overcoated aluminum films for ultraviolet and vacuum ultraviolet［J］.Opt. Precision Eng., 2001,9(2): 165-168.(in Chinese)

[15] [15] LIN D W, GUO CH, ZHANG Y D,et al.. Preparation on vacuum ultraviolet reflective aluminum films［J］. Acta Optica Sinica, 2012,32(2): 231001-1-5.(in Chinese)

[16] [16] LARRUQUERT J I,HUHA R A M K. Far ultraviolet optical properties of MgF2 films deposited by ion-beam sputtering and their application as protective coatings for Al［J］. Optics Communications, 2002,215: 93-99.

[17] [17] PEREA M F, LARRUQUERT J I, AZNAREZ J A,et al.. Vacuum ultraviolet coatings of protected with MgF2 prepared both by ion-beam sputtering and by evaporation［J］. Applied Optics, 2007,46(22): 4871-4878.

[18] [18] PALIK E D. Handbook of Optical Constants of Solids II ［M］. Academic Press, 1998.

[19] [19] GUO CH, LI B CH. Determination of refractive index and thickness of MgF2 film using simulated annlealing algorithm［J］. Opt. Precision Eng., 2013,21(4): 858-863. (in Chinese)

[20] [20] XUE CH R, YI K, QI H J, et al.. Optical constants of film materials for deep ultraviolet/ultraviblet［J］. Chinese Journal of Lasers, 2009,36(8): 2135-2141. (in Chinese)

[21] [21] XUE CH R, YI K, SHAO J D, et al.. Optical properties of several fluoride materials［J］. Opt. Precision Eng.,2009,17(7): 1507-1512. (in Chinese)

[22] [22] WOOD O R,CRAIGHEAD H G,SWEENEY J E,et al.. Vaccum ultraviolet loss in magnesium fluoride films［J］. Applied Optics, 1984,23(20): 3644-3649.

[23] [23] LI B, WANG SH R, HUANG Y. High-precision measurement of spherical mirror reflectivity in vacuum ultraviolet spectrum［J］. Spectroscopy and Spectral Analysis,2011,31(1): 277-281.(in Chinese)