LBT Instruments Overview

Instrument Type Wavelength AO
VIS LBC-B (Left) Wide Field Imager 350 – 650 nm
LBC-R (Right) Wide Field Imager 550 – 1000 nm
MODS 1 (Left) Imager / Spectrograph 320 – 1100 nm
MODS 2 (Right) Imager / Spectrograph 320 – 1100 nm
PEPSI Spectrograph / Polarimeter 383 – 907 nm
NIR/MIR LUCI1 (Left) Imager / Spectrograph 890 – 2440 nm X
LUCI2 (Right) Imager / Spectrograph 960 – 2440 nm X
LMIRCAM Imager / Coronograph 3-5 μm X
NOMIC Imager 8-13 μm X

For the detailed status of the observing modes offered for each instrument, please refer to the LBTO call for proposal page available here.


The Large Binocular Camera (LBC) is the double optical imager installed at the prime foci of the Large Binocular Telescope. LBC is composed by two separated large field cameras, one optimized for the UBV bands (LBC-B) and the second for the VRIZ bands (LBC-R). An optical corrector balances the aberrations induced by the fast (F#=1.14) parabolic primary mirror of LBT, assuring that the 80% of the PSF encircled energy falls inside one pixel. The two channels have similar optical designs satisfying the same requirements, but differ in the lens glasses: fused silica for the "blue" arm and BK7 for the "red" one. The two focal plane cameras use an array of four 4290 chips (4.5x2 K) provided by E2Vi optimized for the maximum quantum efficiency (85%) in each channel. The arrays are cooled by LN2 cryostats assuring 24 hours of operation. A summary of the capabilities of the two cameras is given in the table below.
More information can be found here.

FOV Scale Filters
LBC-BLUE 23'x 25' 0.225"/pix UBessel, BBessel,
VBessel, gsloan,
rsloan, Uspec
LBC-RED 23'x 25' 0.225"/pix VBessel, RBessel, IBessel,
rsloan, isloan, zsloan, F972N20,
Y, TiO_784, CN_817


MODS1 and MODS2 (The Multi-Object Double Spectrographs for the Large Binocular Telescope) are a pair of optical spectrographs and imagers mounted at the SX Nasmyth. Each MODS has two channels highly optimized for the Blue and Red portions of the spectrum. Light can go straight through to the blue or the red channels, or directed to both blue and red channels (dual mode). With a 6 arcminute square field of view it is capable of long-slit and multi-slit spectroscopy as well as imaging in the ugriz bands from 0.33 to 1.1 µm. All modes currently work in seeing-limited mode.
More information is available here and here (manual).

MODE FOV Scale Resolution Blue Red Dual
Imaging 6'x 6' 0.12"/pix -- ug (sloan) riz (sloan) ugriz (sloan)
Grating longslit-MOS 6'x 6' 0.12"/pix 2000 3300-6000 5000-10000 3200-10000
Prism longslit-MOS 6'x 6' 0.12"/pix 150-500 3300-6000 5000-10000 3200-10000


PEPSI (Postdam Echelle Polarimetric and Spectroscopic Instrument) is a high-resolution spectrograph located in the telescope pier, inside a stabilized chamber. PEPSI has two spectrograph cameras that are equipped with a monolithic 10.3kx10.3k CCD, with 9 µm pixels. The entire spectral range from 383 to 907 nm can be covered in three exposures. Spectral resolution up to R=250.000 can be achieved. PEPSI can be used also as a spectropolarimeter.
More information is available here. Two summary tables of the PEPSI capabilities are available below.

Spectroscopic Mode
Fiber Diameter (µm) Sky diameter (") Resolution Spec. cov. (nm)
100 0.74 250,000 383-907
200 1.5 130,000 383-907
300 2.3 50,000 383-907

Polarimetric Mode
Fiber Diameter (µm) Sky diameter (") Resolution Spec. cov. (nm)
200 1.5 130,000 450-907


LUCI1 and LUCI2, (formerly known as LUCIFER) are a pair of near-IR spectrographs and imagers operating in the wavelength range 0.89 µm (LUCI1) or 0.96 µm (LUCI2) to 2.44 µm. Each LUCI is equipped with wide field and narrow field cameras. The wide field camera can operate as imager or spectrograph (LSS and MOS) in 3 modes: seeing limited, ESM or ground layer AO with ARGOS. The narrow field camera can operate as imager (spectroscopy is planned) in single conjugate AO mode with SOUL only. For more information, please visit the official LBTO LUCI web page (manual here) and the INAF Arcetri's web page dedicated to the Science with SOUL.

SEEING LIMITED Imaging 4'x4' 0.12"/pix --
Long Slit/MOS 4'x2' 1"/slit 1000-5000
SOUL - Single conjugated AO
(Down to diffraction limit)
Imaging 30"x30" 0.015"/pix --
Long Slit 30"x30" 0.13"/slit 10000-40000
(Seeing enhancer: factor 1.5-2)
Imaging 4'x4' 0.12"/pix --
Long Slit/MOS 4'x2' 0.50"/slit 2000-11000
(Seeing enhancer: factor 2-3)
Imaging 4'x4' 0.12"/pix --
Long Slit/MOS 4'x2' 0.25"/slit 4000-17000


The Large Binocular Telescope Interferometer (LBTI) is a high spatial resolution instrument developed for coherent imaging and nulling interferometry using the 14.4 m baseline of the 2x8.4m LBT. The unique telescope design, comprising of the dual apertures on a common elevation-azimuth mount, enables a broad use of observing modes. The full system is comprised of dual adaptive optics systems, a 1-5 µm near-infrared phasing camera (called LMIRCam) and an 8-13 µm camera (called NOMIC). Overview of the instrument is here.


LMIRCam (LBT Mid-InfraRed interferometric Camera) is a camera and coronagraph built to exploit the sensitivity of LBTI. It is available in 3 modes: Single and dual aperture non-coherent direct imaging, Single and Dual aperture nonredundant mask imaging, Single aperture apodizing phase plate coronagraphy. It is optimized for 3-5 µm but can be suited for shorter wavelenghts. The field of view is 11"x11".
More information is available here.


NOMIC is a mid-infrared (8-13 μm) camera that uses a 1024x1024 array with a 30 μm pitch which corresponds to 0.018 arc-second pixels on the sky providing a spatial resolution at a 10 μm wavelength of 0.27 arc-seconds for a single 8.4 meter LBT aperture and of 0.10 arcseconds for Fizeau interferometry with the dual apertures.
More information is available here.