Advantages: ( much better than the multi-order wave-plates) 

• Thinner thickness (less than 0.5 mm) 
• Better temperature (38C) 
• Better Wavelength (1.5nm) 
• Better incident angle (4.5) bandwidth
• High damage threshold  

Specification:

                                                                                        
                                                                                                             *  Other sizes and coatings are available upon requirements.