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                            | Specifications |   
                            | Substrate 
                              Material | Substrate 
                              Material: crystal Quartz and MgF2 |   
                            | Dimension | +0.0, 
                              -0.2mm |   
                            | Wavefront 
                              distortion | <l/4 
                              @ 632.8 |   
                            | Retardation 
                              tolerance | up 
                              to ¦Ë/100 at specified wavelength |   
                            | Standard 
                              Wavelength: | VIS: 
                              465nm~610nm |  
                            | NIR: 
                              700nm~1000nm |   
                            | IR: 
                              1200nm~1650nm |   
                            | Parallelism | up 
                              to 10 arc second |   
                            | Surface 
                              quality | 20/10 
                              scratch and dig |  |  
                      |  |   
                      | 
                           
                           
                            | Cemented 
                                Achromatic Waveplate |   
                            | Part 
                                No | Retardation | Outside 
                                Diameter D (mm) | ¦µ 
                                (mm) |   
                            | AW3412 | ¦Ë/4 | 25.4 | 12.7 |   
                            | AW3212 | ¦Ë/2 | 25.4 | 12.7 |   
                            | Airspaced 
                                Achromatic Waveplate |   
                            | Part 
                                No. | Retardation | Outside 
                                Diameter D (mm) | ¦µ 
                                (mm) |   
                            | AW4412 | ¦Ë/4 | 25.4 | 12.7 |   
                            | AW4212 | ¦Ë/2 | 25.4 | 12.7 |   
                            | Optically 
                                Contacted Achromatic Waveplate |   
                            | Part 
                                No. | Retardation | Outside 
                                Diameter D (mm) | ¦µ 
                                (mm) |   
                            | AW2412 | ¦Ë/4 | 25.4 | 12.7 |   
                            | AW2212 | ¦Ë/2 | 25.4 | 12.7 |  |  
                     
                      |  | The 
                        standard waveplate wavelengths (nm) of 
                        Dream Lasers' achromatic waveplates: A. 465~610nm
 B. 700~1000nm
 C. 1200~1650nm
 |   
                      |  | Please 
                        refer to  
                        the Glossary 
                        and Technology 
                        for more information about achromatic waveplates |   
                      |  | Other 
                        sizes and coatings are available upon request. |   
                      |  | Please 
                        refer to Mount 
                        for Waveplates |  |  |