NICS - K3 Grism

The KB (i.e. K broad) grism consists of a 79 lines/mm blaze=63.5 deg transmission grating glued on the hypotenuse of a 63.5 deg prism of IRGn6 glass and working in third order.

The grism is mounted inside the grism wheel of NICS in combination with a custom designed 1.9 Ám cuton filter which acts as order sorter.

For any comments please contact Francesca Ghinassi.