Instrument description
[
Front page
] [
New
|
Page list
|
Search
|
Recent changes
|
Help
|
Log in
]
Start:
------
Contents
#contents()
------
&br;
// ==============
// Optical systems
// ==============
* Optical systems [#t005ff8c]
** Optical layout [#re3c632e]
&ref(NICE_Layout.png,left,50%);
*** Characteristics [#b58ba311]
-Semi-Littrow configuration for an echelle grating.
-White pupil configuration between the echelle and a cros...
-Refractive system is adopted, which makes the system sma...
*** Peripheral optics [#xad046ff]
-Calibration lamp
--Krypton and Argon lamps are used for wavelength calibra...
--Halogen lamp is used for tracing the echelle formats.
-Slit viewer
--Opical CCD (Bitran corp. BU-51LIR type CCD).
--Because filters are placed in front of the slit, incide...
-Imaging
--Rays reflected by the slit surface are divided by a dic...
--The near-infrared rays reach the NICMOS-3 detector thro...
--Objects invisible in the optical wavelength range can b...
** Echelle formats [#h2e595b2]
&ref(NICE_echelle_format.png,left,50%);
-Note that the vertical length covered by spectra increas...
- This is the original format, but due to the increased n...
** Diffraction efficiency [#t1876b95]
&ref(NICE_diffraction_efficiency.png,left,50%);
** Spot diagrams [#o0faa1ed]
&ref(NICE_spot_diagram.png,left,50%);
-The panels correspond to the circle positions in the ech...
&br;
// ==============
// Optical Devices
// ==============
* Optical Devices [#z559e366]
** Specifications [#j5c5b71a]
|~Device|~Specification|
|Slit (physical size)|257 x 546 μm, 515 x 546 μm, 772 x...
|Slit (effective size)|0.5" x 1.5", 1.0" x 1.5", 1.5" x...
|Filter|IJ (0.8-1.5 μm), HK (1.4-2.5 μm), J, H, Ks, Close...
|Semi-littrow part|4 refractive lenses (S-FPL53 + S-TIH14...
|Echelle|24.35 lines/mm, blaze angle = 70 deg|
|Collimator (spectroscopy)|3 refractive lenses (BaF2 + S-...
|Cross disperser (lines/mm, braze angle in deg)|CD-J (400...
|Re-imaging lens|5 refractive lenses (BaF2 + S-TIH14 + Ca...
|Detector|NICMOS-3 (256 x 256 pixels, 40 μm/pixel)|
|Collimator (imaging)|3 refractive lenses (BaF2 + S-TIH14...
|Relay lens (slit viewer)|4 achromatic lenses in two grou...
|Detector (slit viewer)|Sony ICX825 CCD (1360 x 1024 pixe...
** Slit [#mb2d14ca]
- The slits are available in three different widths, 257 ...
-- Due to technical limitations, for the slit length dire...
- Since the slit is tilted 45° in the direction of slit w...
-- Taking this into account, the effective slit sizes are...
- The slit holes are arranged so that one side of the sli...
- The slit is mirror coated. Incident light that does not...
- Since reflected light is observed in the imaging mode a...
|~Appearance|~Slit & Slit Mask (front view)|~Imaging Mode...
|&ref(slit_appear.png,left,30%);|&ref(slit.png,left,30%);...
** Filter [#a3b5bdab]
- The filter wheel has six holes, each installed with the...
- IJ (I or J) or HK (H or K) filters are used in the spec...
- J, H, and Ks filters are for photometry in the imaging ...
- Close filter is mainly used to obtain calibration files...
|~Appearance|~Configuration|~Transmittance|
|&ref(filter_appear.png,left,50%);|&ref(filter_config.png...
** Cross disperser [#x8a27a2d]
- The cross disperser changer includes three cross disper...
- The I and J modes of spectroscopy utilize the common cr...
- A plane mirror is gold coated for the infrared imaging ...
#ref(cross_disperser.png,left,60%);
** Detector [#h5bda196]
*** Characteristics [#q194074a]
|~Item|~Value|
|Array|CENTER:NICMOS-3|
|Array size|CENTER:256 x 256 pixels|
|Pixel size|CENTER:40 μm x 40 μm|
|Quantum Efficiency|CENTER: ~60%†|
|Gain|CENTER:9.4 e-/ADU|
|Readout noise|CENTER:93 e-|
|Dark current|CENTER:0.35 e-/s|
†: 2MASS project measurements are quoted.
*** Linearity [#xf73e7bb]
- TBD.
*** Gain & Readout Noise [#afb16121]
- The detector gain and readout noise were measured using...
- The measurement method was based on http://spiff.rit.ed...
- Five pairs of data were acquired with the same settings...
- Fitting was performed on data that remained linearity (...
- The results showed a gain of 9.4 e-/ADU and a readout n...
#ref(mvplot.png,left,20%);
*** Quantum Efficiency [#a12c2df8]
- We have not measured the quantum efficiency, but the va...
-- Reference: https://old.ipac.caltech.edu/2mass/releases...
#ref(nicmos3_qe.png,left,20%);
*** Dark [#be83d107]
- TBD.
** Slit viewer [#q576e81c]
- The product BU-51 LIR by Bitran Corp. is used.
- The CCD is Sony ICX825 (1360 x 1024 pixels, 6.45 μm/pix...
- The quantum efficiency has not been measured, but Bitra...
|~Appearance|~Quantum Efficiency|
|&ref(BU-51LIR.png,left,20%);|&ref(sv_qe.png,left,15%);|
&br;
// ==============
// Mechanical systems
// ==============
* Mechanical system [#xa1817e9]
-The whole system, except for the calibration lamps and t...
-The optical bench consists of a thin aluminum plate and ...
-The cold-box also works as a radiation field.
-The cold-box is cooled down to ~120 K to reduce the ther...
-NICE needs no particular alignment process because the o...
&br;
// ==============
// Data acquisition
// ==============
* Data acquisition [#w7f4f89f]
-The driving clock patterns for the NICMOS-3 are transfer...
-The analog signal from the detector is amplified by a "P...
-GUI control software, running on a Windows 2000 PC, disp...
#ref(NICE_control_system.png,left,50%);
&br;
// ==============
// References
// ==============
* References [#m9888b40]
- Development of a Near-Infrared Echelle Spectrograph "NI...
- The University of Tokyo Atacama Observatory 6.5m telesc...
End:
------
Contents
#contents()
------
&br;
// ==============
// Optical systems
// ==============
* Optical systems [#t005ff8c]
** Optical layout [#re3c632e]
&ref(NICE_Layout.png,left,50%);
*** Characteristics [#b58ba311]
-Semi-Littrow configuration for an echelle grating.
-White pupil configuration between the echelle and a cros...
-Refractive system is adopted, which makes the system sma...
*** Peripheral optics [#xad046ff]
-Calibration lamp
--Krypton and Argon lamps are used for wavelength calibra...
--Halogen lamp is used for tracing the echelle formats.
-Slit viewer
--Opical CCD (Bitran corp. BU-51LIR type CCD).
--Because filters are placed in front of the slit, incide...
-Imaging
--Rays reflected by the slit surface are divided by a dic...
--The near-infrared rays reach the NICMOS-3 detector thro...
--Objects invisible in the optical wavelength range can b...
** Echelle formats [#h2e595b2]
&ref(NICE_echelle_format.png,left,50%);
-Note that the vertical length covered by spectra increas...
- This is the original format, but due to the increased n...
** Diffraction efficiency [#t1876b95]
&ref(NICE_diffraction_efficiency.png,left,50%);
** Spot diagrams [#o0faa1ed]
&ref(NICE_spot_diagram.png,left,50%);
-The panels correspond to the circle positions in the ech...
&br;
// ==============
// Optical Devices
// ==============
* Optical Devices [#z559e366]
** Specifications [#j5c5b71a]
|~Device|~Specification|
|Slit (physical size)|257 x 546 μm, 515 x 546 μm, 772 x...
|Slit (effective size)|0.5" x 1.5", 1.0" x 1.5", 1.5" x...
|Filter|IJ (0.8-1.5 μm), HK (1.4-2.5 μm), J, H, Ks, Close...
|Semi-littrow part|4 refractive lenses (S-FPL53 + S-TIH14...
|Echelle|24.35 lines/mm, blaze angle = 70 deg|
|Collimator (spectroscopy)|3 refractive lenses (BaF2 + S-...
|Cross disperser (lines/mm, braze angle in deg)|CD-J (400...
|Re-imaging lens|5 refractive lenses (BaF2 + S-TIH14 + Ca...
|Detector|NICMOS-3 (256 x 256 pixels, 40 μm/pixel)|
|Collimator (imaging)|3 refractive lenses (BaF2 + S-TIH14...
|Relay lens (slit viewer)|4 achromatic lenses in two grou...
|Detector (slit viewer)|Sony ICX825 CCD (1360 x 1024 pixe...
** Slit [#mb2d14ca]
- The slits are available in three different widths, 257 ...
-- Due to technical limitations, for the slit length dire...
- Since the slit is tilted 45° in the direction of slit w...
-- Taking this into account, the effective slit sizes are...
- The slit holes are arranged so that one side of the sli...
- The slit is mirror coated. Incident light that does not...
- Since reflected light is observed in the imaging mode a...
|~Appearance|~Slit & Slit Mask (front view)|~Imaging Mode...
|&ref(slit_appear.png,left,30%);|&ref(slit.png,left,30%);...
** Filter [#a3b5bdab]
- The filter wheel has six holes, each installed with the...
- IJ (I or J) or HK (H or K) filters are used in the spec...
- J, H, and Ks filters are for photometry in the imaging ...
- Close filter is mainly used to obtain calibration files...
|~Appearance|~Configuration|~Transmittance|
|&ref(filter_appear.png,left,50%);|&ref(filter_config.png...
** Cross disperser [#x8a27a2d]
- The cross disperser changer includes three cross disper...
- The I and J modes of spectroscopy utilize the common cr...
- A plane mirror is gold coated for the infrared imaging ...
#ref(cross_disperser.png,left,60%);
** Detector [#h5bda196]
*** Characteristics [#q194074a]
|~Item|~Value|
|Array|CENTER:NICMOS-3|
|Array size|CENTER:256 x 256 pixels|
|Pixel size|CENTER:40 μm x 40 μm|
|Quantum Efficiency|CENTER: ~60%†|
|Gain|CENTER:9.4 e-/ADU|
|Readout noise|CENTER:93 e-|
|Dark current|CENTER:0.35 e-/s|
†: 2MASS project measurements are quoted.
*** Linearity [#xf73e7bb]
- TBD.
*** Gain & Readout Noise [#afb16121]
- The detector gain and readout noise were measured using...
- The measurement method was based on http://spiff.rit.ed...
- Five pairs of data were acquired with the same settings...
- Fitting was performed on data that remained linearity (...
- The results showed a gain of 9.4 e-/ADU and a readout n...
#ref(mvplot.png,left,20%);
*** Quantum Efficiency [#a12c2df8]
- We have not measured the quantum efficiency, but the va...
-- Reference: https://old.ipac.caltech.edu/2mass/releases...
#ref(nicmos3_qe.png,left,20%);
*** Dark [#be83d107]
- TBD.
** Slit viewer [#q576e81c]
- The product BU-51 LIR by Bitran Corp. is used.
- The CCD is Sony ICX825 (1360 x 1024 pixels, 6.45 μm/pix...
- The quantum efficiency has not been measured, but Bitra...
|~Appearance|~Quantum Efficiency|
|&ref(BU-51LIR.png,left,20%);|&ref(sv_qe.png,left,15%);|
&br;
// ==============
// Mechanical systems
// ==============
* Mechanical system [#xa1817e9]
-The whole system, except for the calibration lamps and t...
-The optical bench consists of a thin aluminum plate and ...
-The cold-box also works as a radiation field.
-The cold-box is cooled down to ~120 K to reduce the ther...
-NICE needs no particular alignment process because the o...
&br;
// ==============
// Data acquisition
// ==============
* Data acquisition [#w7f4f89f]
-The driving clock patterns for the NICMOS-3 are transfer...
-The analog signal from the detector is amplified by a "P...
-GUI control software, running on a Windows 2000 PC, disp...
#ref(NICE_control_system.png,left,50%);
&br;
// ==============
// References
// ==============
* References [#m9888b40]
- Development of a Near-Infrared Echelle Spectrograph "NI...
- The University of Tokyo Atacama Observatory 6.5m telesc...
Page:
![[PukiWiki]](image/tao_icon.gif "[PukiWiki]"){kind=icon}
