大口徑光學(xué)標(biāo)準(zhǔn)具
作者: Kevin Peng 發(fā)布于: 2016-11-07 01:20 點(diǎn)擊:次
IC Optical Systems Ltd 公司是世界上生產(chǎn)口徑最大的標(biāo)準(zhǔn)具（Etalon）的唯一生產(chǎn)廠家。直徑最大可到150mm，標(biāo)準(zhǔn)距被大量用于激光腔中的線寬壓縮，還可作為寬帶皮秒激光器中帶寬控制以及調(diào)諧器件，還包括激光線寬檢測，可廣泛應(yīng)用于天文，遙感探測等用途。
我們的標(biāo)準(zhǔn)具具有實(shí)時(shí)反饋和校正系統(tǒng)，系統(tǒng)采用閉循環(huán)結(jié)構(gòu)，采用電容反饋系統(tǒng)實(shí)時(shí)監(jiān)控標(biāo)準(zhǔn)具受溫度壓力等外界因素的影響；采用壓電陶瓷精確控制調(diào)節(jié)標(biāo)準(zhǔn)具內(nèi)部的間隙、偏角和俯仰。
標(biāo)準(zhǔn)具針對波長連續(xù)可調(diào)，適用波長范圍：180-1500nm，1um-15um，可選擇采用預(yù)對準(zhǔn)系統(tǒng)對系統(tǒng)進(jìn)行校正。
CS100 Controller & ET Series Etalons
What is the ICOS system?
The ICOS servo-stabilized Fabry-Perot interferometer system comprises ET-Series II PZT tuned etalons, and the unique CS100 control unit, which stabilizes the spacing and parallelism of these etalons to an unrivalled degree of accuracy. As a turn-key system, power-up to operation need only take minutes. The unique construction of ET-Series II etalons ensures th at when the recommended balance conditions are dialled into the CS100, the etalon will be aligned and ready for use.
How does it work?
The CS100 is a three-channel bridge system which uses capacitance micrometers and PZT acuators, incorporated into the etalon, to monitor and correct errors in mirror parallelism and spacing. Two channels control parallelism and the third maintains spacing by referencing the cavity length-sensing capacitor to a high stability standard referen ce capacitor, also located in the etalon. Because this is a closed-loop system, non-linearity and hysteresis in the PZT drive are eliminated entirely, as of course are drifts in cavity parallelism and spacing. The CS100 can be operated manually from front panel controls, or under computer control using either the IEEE-488 or RS232 interfaces, or the analog drive input.
How stable is it?
The CS100 will control the spacing and parallelism of an ET etalon to better than 0.01% o f a Free Sp ectral Range (FSR). The stability of a transmitted wavelength will depend on the ambient environment, and can b e as good as 1 part in 10¹º if the etalon is mounted in the optional sealed cell and the system carefully temperature controlled. Under either computer or manual control, the CS100 allows random access tuning of an ET-Series II etalon over its spectral range with sub-millisecond response time.
The CS100 Controller.
The high quality modular constru ction of the CS100 makes it robust and reliable. High quality precision components are used throughout to ensure the performance of the unit. The standard equipment includes an RS232 interface, allowing full remote control of the etalon parallelism, mirror spacing and system response time. A ±10V analog input gives linear control of the etalon spacing over a range of approximately ± 1µm.
CS100 Specifications
Electronic Noise Equivalent
Displace-ment of Etalon Mirrors (with standard 3m cables) |
10pmHz-1/2RMS |
Electronic Drift
(Temperature Stability) |
0± 50pm C-1 |
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Setting Time (Response to step input) |
<1.0ms |
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Resolution |
12 bits |
Output voltage to Piezo-electric
Trans-ducers |
±750 V |
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Interfaces |
RS232 |
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Analogue Input |
±10V |
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Operational Temperature Range |
0-50oC ambient |
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Size: 19 inch rack |
483 x 133 x 380mm |
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cabinet |
520 x 153 x 400mm |
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Mains Voltage |
210-260 VAC or 0-130 VAC at 50/60Hz |
ET-Series II Etalons
Tunable by up to 15 orders in the visible, these etalons are cemented and optically contacted and thus making their construction mechanically robust with an exceptionally high level of vibrational immunity.
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ET-Series II Etalon Specification |
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Clear Apertures |
28mm, 50mm, 70mm, 85mm, 100mm, 116mm, 150mm |
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Surface Quality |
FS etalons λ/50, λ/100, λ/200 (λ= 633nm) before coating |
|
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WF etalons λ/50 (λ= 633nm) |
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CQ etalons λ/200 (λ= 633nm) |
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ZS etalons λ/100 (λ= 3μm) |
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Wedge Angle |
Zero ± 1 fringe or 10-15 arc min (nominal) |
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Mirror Spacing |
Specified by user in the range 3μm-100mm |
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Cavity Tuning |
CQ, FS and WF etalons 3μm (nominal) |
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Range |
ZS etalons 7.5μm (nominal) |
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FS . Fused Silica, |
WF . Water-free Silica, |
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ZS . Zinc Selenide, |
CQ .Crystal Quartz. |
用戶：
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Optics for Wind Imaging Interferometer (WINDII)
NASA Upper Atmosphere Research Satellite (UARS)
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Image derotator prism system for 4.2m William Herschel Telescope
Royal Greenwich Observatory
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Grooved Fabry-Perot substrates for Large Angle Spectrometric Coronagraph (LASCO)
NASA/ESA Solar Heliospheric Observatory (SOHO)
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UV catadioptic systems for chemical processing at 193nm
MIT Lincoln Laboratory
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Etalons for Doppler Wind Lidar systems
NASA Goddard Space Flight Center
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University of Science and Technology of China
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