Practical color holographic master fabrication method based on computer-generated holography and optical interference

Area of Science:

• Optics and Photonics
• Holography
• Materials Science

Background:

• Traditional color holography often requires complex multi-wavelength recording.
• Computer-generated holography (CGH) offers a digital approach to hologram creation.
• Efficient fabrication of holographic masters is crucial for widespread adoption.

Purpose of the Study:

• To present a practical technique for fabricating color holographic masters in array form.
• To develop a single wavelength equivalent color computer-generated holograph (ECCGH) algorithm.
• To combine CGH with laser interference for master fabrication.

Main Methods:

• A novel ECCGH algorithm was developed, encoding 3D color information using a single wavelength.
• Holograms were fabricated on silver halide photosensitive material using a direct-write CGH system.
• A holographic master fabrication scheme combined CGH with laser interference for recording on photoresist.

Main Results:

• The ECCGH algorithm successfully encoded 3D color information within a single wavelength.
• The fabricated holographic masters exhibited surface relief structures in array form.
• Experimental results validated the feasibility of the proposed method.

Conclusions:

• The proposed method provides a practical and feasible approach for creating color holographic masters.
• The ECCGH algorithm and fabrication scheme offer a simplified route to 3D color holography.
• This technique has potential for advancing holographic display and data storage technologies.