Achromatic Waveplate
Achromatic waveplate is similar to zero order waveplate except that the two plates are made from different birefringent
crystals. Since the dispersion of the birefringence of two materials is different, it is possible to specify the retardation
values at a broad wavelength range. So, the retardation will be less sensitive to wavelength change. In other words,
it can be used at a broadband wavelength range.

Material:   Crystal Quartz and MgF2
Dimension tolerance:   +0/-0.2mm                       
Wavefront distortion:  λ/4@632.8nm                      
Retardation tolerance:  up to λ/100 at specified wavelength                            
Parallelism:   <10 arc second                              
Surface quality:   40-20                                 
Clear aperture:   >90% central area 
Standard Wave: quarter-wave(λ/4), half-wave(λ/2)                        
coating:  < AR/AR  R<1% per face
Standard size Φ10 Φ12.7 Φ15
Φ20 Φ25.4 Φ30
450-650nm 550-750nm
650-1100nm 900-2100nm


Ms. Lin

Mr. Wen