Holographic Concave Gratings - Type I
HORIBA Scientific produces a wide range of holographic master gratings from which high precision replicas are manufactured.
Type I holographic concave gratings are recorded on spherical substrates, with equidistant and parallel grooves.
Their geometric optical properties are the same as classically ruled gratings and are interchangeable with them.
When used in a spectrograph, Type I holographic concave gratings are traditionally arranged on the Rowland circle (i.e., the circle defined by the grating center and the tangential radius of curvature of the grating).
