How have the problems with holography been solved?

HOLOGRAPHIC PROBLEM:
No suitable recording media existed.

INPHASE SOLUTIONS:
tapestry™, a high-performance, proprietary material with proven high-density storage capabilities, was invented by InPhase Technologies.

InPhase also invented ZeroWave™, a flat media manufacturing process that enables the use of inexpensive substrates, similar to the DVD manufacturing process.

HOLOGRAPHIC PROBLEM:
Recording methods were complex, difficult to implement and achieved limited densities.

INPHASE SOLUTION
InPhase Technologies invented new multiplexing recording methods that enable a simple, compact storage system. The new methods include combining angle multiplexing with the new polytopic multiplexing. This is implemented in a phase conjugate architecture so that almost all of the optics are on one side of the disk. A new fractional oversampling detection increases the margin of the drive.

HOLOGRAPHIC PROBLEM:
The operational temperature range was limited.

INPHASE SOLUTION
InPhase Technologies developed a compensation scheme that allows a wide range of operating temperatures.

HOLOGRAPHIC PROBLEM:
Lasers were costly and unreliable.

INPHASE SOLUTION
DVD recording technologies require the availability of high-quality, price-competitive lasers. InPhase Technologies takes advantage of available red and blue lasers which are used in other high-volume products.

HOLOGRAPHIC PROBLEM:
Detectors were costly and had poor performance.

INPHASE SOLUTION
CMOS active pixel sensor arrays, such as those used in digital cameras, are of high quality and are readily available.

HOLOGRAPHIC PROBLEM:
Spatial Light Modulators had slow frame rates and poor optical contrast.

INPHASE SOLUTION
Commercially-available digital micromirrors, and ferroelectric modulators used in digital TVs and projectors satisfy the requirements.