fixed-crest
fixed-cycle
fixed-delivery
fixed-dispersion
fixed-drum
fixed-end
fixed-ended
fixed-entropy
fixed-focus
fixed-format
  fixed-frequency
fixed-fuel
fixed-function
fixed-gain
fixed-geometrical
fixed-geometry
fixed-grate
fixed-head
fixed-hinge
fixed-jet
fixed-lag

    fixed-frequency grating

    дифракционная решётка с постоянной частотой, дифракционная решётка с постоянной пространственной частотой