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ao:dichroic_specification [2018/07/07 09:12] jones |
ao:dichroic_specification [2018/07/07 09:22] (current) jones [Finished beam splitter transmission/reflection curves received from vendor Uploaded 2013-10-31] |
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====== Dichroic Specification ====== | ====== Dichroic Specification ====== | ||
===== Note and Files ===== | ===== Note and Files ===== | ||
- | \\ Some notes and files concerning the specification of the Dichroic.\\ \\ {{ao: | + | \\ Some notes and files concerning the specification of the Dichroic.\\ \\ {{ao: |
===== IR Dichroic Short-Wave Cutoff ===== | ===== IR Dichroic Short-Wave Cutoff ===== | ||
\\ There appears to be some consensus that highly reddened objects are important fot he IR dichroic, so the long-wave cutoff should be 1 micron or so. The short-wave cutoff is controversial. The key drivers for cutoff are: | \\ There appears to be some consensus that highly reddened objects are important fot he IR dichroic, so the long-wave cutoff should be 1 micron or so. The short-wave cutoff is controversial. The key drivers for cutoff are: | ||
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| Image shift (60 degrees from zenith, arcsec)\\ | 1.64\\ | 0.87\\ | 0.44\\ | 0.18\\ | 0\\ | | | Image shift (60 degrees from zenith, arcsec)\\ | 1.64\\ | 0.87\\ | 0.44\\ | 0.18\\ | 0\\ | | ||
These two tables, taken together, imply that for a 500nm dichroic short-wave cutoff (with respect to a 400nm cutoff), there would be a 0.06 mag sensitivity loss at zenith, and a sensitivity gain at higher airmasses. A 600nm dichroic short-wave cutoff (with respect to a 500nm cutoff) loses an additional 0.12 mags sensitivity at zenith and doesn' | These two tables, taken together, imply that for a 500nm dichroic short-wave cutoff (with respect to a 400nm cutoff), there would be a 0.06 mag sensitivity loss at zenith, and a sensitivity gain at higher airmasses. A 600nm dichroic short-wave cutoff (with respect to a 500nm cutoff) loses an additional 0.12 mags sensitivity at zenith and doesn' | ||
- | ===== **Coating specifications** ===== | + | ===== Coating specifications ===== |
\\ We agreed to send the following coating specifications to vendors in October, 2012\\ | \\ We agreed to send the following coating specifications to vendors in October, 2012\\ | ||
==== Finished beam splitter transmission/ | ==== Finished beam splitter transmission/ | ||
- | [[/ | + | {{ao:AO-VISsplitter.PDF|AO-VISsplitter.PDF}}\\ |
+ | {{ao:AO-YSOsplitter.PDF|AO-YSOsplitter.PDF}}\\ | ||
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