UT 15-color dichroic-mirror camera and future prospects

Mamoru Doi; Hisanori Furusawa; Fumiaki Nakata; Sadanori Okamura; Masaki Sekiguchi; Kazuhiro Shimasaku; Norihide Takeyama

doi:10.1117/12.316789

9 July 1998 UT 15-color dichroic-mirror camera and future prospects

Mamoru Doi, Hisanori Furusawa, Fumiaki Nakata, Sadanori Okamura, Masaki Sekiguchi, Kazuhiro Shimasaku, Norihide Takeyama

Author Affiliations +

Proceedings Volume 3355, Optical Astronomical Instrumentation; (1998) https://doi.org/10.1117/12.316789
Event: Astronomical Telescopes and Instrumentation, 1998, Kona, HI, United States

Abstract

We describe the design and performance of a dichroic-mirror camera (DMC) which can take 15 narrow-band images simultaneously. We separate the wavelength range of 390 - 950 nm into 15 narrow bands with 14 dichroic mirrors. The detector of DMC is a mosaic CCD camera which has 15 CCDs (TI TC-215). When we put DMC to the MAGNUM 2-m (F/9) telescope being built at Haleakala, Hawaii, the field of view becomes about 4.5 arcmin in diameter. The design of optics shows that we can get an image size of about 0.13 arcsec r.m.s. or better (without atmosphere), though we use only two different kind of lenses (the camera lens and the collimator lens). The system throughput of DMC as a function of wavelength is quantitatively estimated. Simulations using spectra of galaxies ad Qnd QSOs show that DMC can get a signal-to-noise (S/N) of approximately greater than 5/band/object for galaxies (I_AB equals 22) and QSOs (I_AB equals 23) in the images of 30 min - 1 hour exposure taken with a 2-m telescope. Future prospects for possible enhancements and applications of dichroic-mirror system are also discussed. Having a DMC with resolution of about 30 would be very adequate for high redshift supernovae search. To get higher resolution, DMC combined with Fabry-Perot's is an interesting possibility.

Citation Download Citation

Mamoru Doi, Hisanori Furusawa, Fumiaki Nakata, Sadanori Okamura, Masaki Sekiguchi, Kazuhiro Shimasaku, and Norihide Takeyama "UT 15-color dichroic-mirror camera and future prospects", Proc. SPIE 3355, Optical Astronomical Instrumentation, (9 July 1998); https://doi.org/10.1117/12.316789

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available