Holographic
Materials

At its dedicated coating facility, TruLife Optics coats glass plates with panchromatic (RGB), or monochromatic Red, Green or Blue silver halide emulsion. These include plates up to 50 cm x 60 cm – ideal for automotive applications.

TruLife Optics utilises these plates for prototyping and mastering HOEs for RGB mass replication.

Our proprietary emulsion consists of uniformly-sized nanograins providing ultra-low levels of scatter with high diffraction efficiency.

For applications requiring high transparency, similar to glass, we use a proprietary in-house processing method to produce holograms where the gelatin base material alone provides the required phase information after the removal of all the holographically exposed silver halide. The original diffraction efficiency is preserved in this special process.

Silver Halide is much more sensitive to light than photopolymer for forming holograms, making larger sizes or faster exposure times possible. Typical exposure speeds are 10 to 100 times faster than polymer.

Our high refractive index modulation, modifiable by processing, ensures a larger broadband response compared to typical photopolymer modulation values particularly for thin layers, resulting in wider angular acceptance.

Silver Halide is a non real-time material and so allows multiple gratings to be shot easily on the same layer.

We can coat the surfaces of RX spectacle lenses, enabling high functioning HOE’s to be recorded directly on the lens, simplifying the holographic encapsulation process in RX lenses. We can also coat and record on visors, car windshields and any other freeform shape surfaces.

TruLife Optics utilises multiple holographic techniques developed over many years by our dedicated team of holographers. Some industry leading achievements include:

Bandwidth shaping – an ability to manipulate the bandwidth to generate a predefined spectral curve. This is typically modelled first using our proprietary single or multiple grating models.

Clear diffusers – we have pioneered ways of shooting a holographic diffuser that is transparent.

Multiple gratings in a single layer of photopolymer. Photopolymer is not easily utilised for multiple gratings without adding unwanted parasitic gratings from the real time effects of the material. We have developed methods to fabricate these gratings while suppressing the unwanted parasitic gratings