Geola Digital Bayfol®HX 200高分子全息膜
Geola Digital Bayfol® HX 200 是一种光敏、自显影的光聚合物薄膜，可用于制作体反射全息图和体透射全息图形式的相位全息图。
Geola Digital Bayfol® HX 200 可以使用 440 nm 至 680 nm 可见光谱波长范围内的适当激光进行记录。全息图形成后无需任何后续处理，既不需要湿法处理，也不需要热处理。
Geola Digital Bayfol® HX 200 由三层结构组成：基底层、光敏光聚合物层和保护性覆盖膜。基底层为三醋酸纤维素薄膜（TAC），保护性覆盖膜为聚乙烯薄膜（PE）。保护性覆盖膜可从光聚合物上剥离。
Geola Digital 该产品可用于制作多种类型的体全息图。
Layer stack, schematic
Approximate laser pulse dosage:
| λ = 633 nm | approx. 15 mJ/cm² |
| λ = 532 nm | approx. 20 mJ/cm² |
| λ = 457 nm | approx. 25 mJ/cm² |
Transmissions spectrum of the unrecorded photopolymer film
Guideline data1)
| General properties | |||
| Property | Value | Unit of measurement | Method |
| Typical substrate thickness | 60 ± 2 | microns | acc. to ISO 4593, 23°C |
| Typical photopolymer thickness | 16 ± 2 | microns | white light interferometer |
| Typical cover layer thickness | 40 | microns | acc. to ISO 4593, 23°C |
| Density with cover foil | 1.15 | g/cm3 | ISO 1183, 20°C, Method C |
| Optical properties | |||
| Transmittance (unrecorded film, w/o cover foil) | See spectrum above | % | ASTM E 01348 |
| Haze (after UV flood cure2)) | < 2 | % | ASTM D 1003 |
| Index of refraction nD of the substrate | 1.485 | Prism coupler | |
| Index of refraction nD of the photopolymer (unrecorded) | 1.500 | Prism coupler | |
| Index of refraction nD of the photopolymer (after UV flood cure2)) | 1.505 | Prism coupler | |
| Holographic properties: Denisyuk hologram performance data3) | |||
| Spectral diffraction efficiency η | > 95 | % | ISO 17901-1, by transmittance of zeroorder transmitted wave |
| Spectral bandwidth (full width at half maximum) | ˜ 15 | nm | ISO 17901-1, by transmittance of zeroorder transmitted wave |
| Recording dosage (needed to achieve above mentioned values) | ˜ 30 | mJ/cm2 | Recording wavelength: λ = 532 nm; Power density: PR= 4.6 mW/cm2 |
| Holographic properties: Reflection hologram performance data4) | |||
| Maximum refractive index modulation Δn1 per recording wavelength λ | ISO 17901-2 | ||
| λ = 633 nm | > 0.03 | ||
| λ = 532 nm | > 0.03 | ||
| λ = 457 nm | > 0.03 | ||
| Typical recording dosage needed to achieve above Δn1 values | ISO 17901-2 | ||
| λ = 633 nm | ˜ 15 | mJ/cm2 | Applied total dosage |
| λ = 532 nm | ˜ 20 | mJ/cm2 | Applied total dosage |
| λ = 457 nm | ˜ 25 | mJ/cm2 | Applied total dosage |
| Shrinkage and spectral shift | |||
| Effective thickness shrinkage (after recording and UV flood cure2)) | ˜ 1.4 | % | Reflection holograms |
| Spectral shift (after recording and UV flood cure2)) | ˜ -8 | nm | Denisyuk holograms: Wavelength deviation between recording and reconstruction |
