  To obtain full Stokes spectra in multi-wavelength windows simultaneously, we
developed a new spectro-polarimeter on the Domeless Solar Telescope at Hida
Observatory. The new polarimeter consists of a 60 cm aperture vacuum telescope
on an altazimuth mount, an image rotator, a high dispersion spectrograph,
polarization modulator and analyzer composed of a continuously rotating
waveplate with a retardation nearly constant around 127$^{circ}$ in 500 - 1100
nm and a polarizing beam splitter located closely behind the focus of the
telescope, fast and large format CMOS cameras and an infrared camera. The slit
spectrograph allows us to obtain spectra in as many wavelength windows as the
number of cameras. We characterized the instrumental polarization of the entire
system and established the polarization calibration procedure. The cross-talks
among the Stokes Q,U and V are evaluated to be about 0.06% $sim$ 1.2% depending
on the degree of the intrinsic polarizations. In a typical observing setup, a
sensitivity of 0.03% can be achieved in 20 - 60 second for 500 nm - 1100 nm.
The new polarimeter is expected to provide a powerful tool to diagnose the 3D
magnetic field and other vector physical quantities in the solar atmosphere.
