Acta Optica Sinica, Volume. 41, Issue 7, 0722002(2021)
Design of Optical System for Broadband and Integrated AOTF Imaging Spectrometer
Figures & Tables(13)
Fig. 5. MTF curves of each wave band. (a) 0.4--1.0 μm; (b) 1.0--3.0 μm; (c) 3.0--5.0 μm
Table 1. Parameters of CCD
View tableTable 1. Parameters of CCD
Type of CCD Wavelength /μm Resolution ratio /(pixel×pixel) Pixel size /μm Manufacturer C9100-23B C10633-34 LCT650 0.4--1.0 1.0--3.0 3.0--5.0 512×512 640×512 640×480 16 20 28 Hamamatsu Hamamatsu LMT
Table 2. Optical parameters of each optical system
View tableTable 2. Optical parameters of each optical system
Optical system f' /mm F 2ω /(°) Special requirement Front optical system 125 5 5.3 / Collimating system 125 5 5.3 The aperture stop is in front AOTF / / / The whole system aperture stop is located on it Imaging system 125 5 5.3 The aperture stop is in front
Table 3. Decentration and tilt of each mirror in collimation system and imaging system
View tableTable 3. Decentration and tilt of each mirror in collimation system and imaging system
Parameter M1 M2 M3 Decentration /mm -2.25 9.71 -42.62 Tilt /(°) -8.85 14.94 -9.46 Conic constant -0.0057 -0.5971 0.2905 4th order coefficient 3.2099×10-8 1.1255×10-7 4.5249×10-9 6th order coefficient 6.8373×10-13 -7.0802×10-12 -1.3881×10-12
Table 4. Free-form surface parameters of 2th and 3th mirrors of front optical system
View tableTable 4. Free-form surface parameters of 2th and 3th mirrors of front optical system
Parameter M5 M6 x2 -0.000210697216032047 0.000255701901033404 y2 -0.00171804160559217 -0.000236872764458664 x2y 9.04570554409036×10-5 6.20840490996327×10-5 y3 2.00886732732122×10-5 2.4067793728652×10-5 x4 8.14765363997121×10-7 1.11814320160958×10-6 x2y2 1.07561516752013×10-6 1.93207601895823×10-6 y4 -5.15133651906762×10-7 6.9508661703245×10-8 x2y3 1.63554420207729×10-7 7.35226113716151×10-8 x4y 1.06110204783277×10-7 6.55137454872012×10-8 y5 4.59026670330349×10-8 4.82190236092222×10-9 x6 2.94401246962391×10-9 -1.98161446537076×10-10 x4y2 6.81970754121763×10-9 1.71051475340913×10-9 x2y4 3.89696710828571×10-9 1.0572403532361×10-9 y6 6.27978015435262×10-10 3.26946542626363×10-12
Table 5. Decentration and tilt of each mirror of front optical system
View tableTable 5. Decentration and tilt of each mirror of front optical system
Parameter M4 M5 M6 Decentration /mm -50.00 13.51 31.97 Tilt /(°) -10.98 9.76 15.39
Table 6. MTF values of whole optical system
View tableTable 6. MTF values of whole optical system
Spatial frequency / (lp·mm-1) Spectral band /μm Wavelength / μm MTF 50 0.4--1.0 0.4 0.5 0.7 0.9 1.0 0.787 0.771 0.707 0.651 0.621 20 1.0--3.0 1.0 1.5 2.0 2.5 3.0 0.845 0.778 0.711 0.643 0.577 12 3.0--5.0 3.0 3.5 4.0 4.5 5.0 0.742 0.701 0.659 0.619 0.579
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Lingying Chang, Qiang Zhang, Yuehong Qiu. Design of Optical System for Broadband and Integrated AOTF Imaging Spectrometer[J]. Acta Optica Sinica, 2021, 41(7): 0722002
Paper Information
Category: Optical Design and Fabrication
Received: Oct. 9, 2020
Accepted: Nov. 23, 2020
Published Online: Apr. 11, 2021
The Author Email: Zhang Qiang (johnson_zhang1994@126.com)
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