Tag Archives: Laser

Tripping Over the Laser Light – Fantastic~!

There needs to be some stage setting before getting to the post-play-out conversation of Christie’s monumental effort of presenting Hugo at the IBC’s Monday Big Movie Night. So, before elaboration on the details: Hats off to Christie and hats off to lasers – Great Science, Great Movie, Great Effort, Great Presentation.

There are two important “everybody knows” issues that need eliminating before discussing the Christie effort. The first is to counter the wishful thinking that has morphed into a meme-life of its own. It gets stated by people who should know better and was even in an earlier slide presentation in the same auditorium on the same afternoon of the Hugo presentation.

The meme says: There is a SMPTE/ISO/DCI luminance standard for 2D presentations (48 candelas per square meter, or 14 foot-Lamberts), but the DCI 3D document only speaks to starting the sequence with the left eye, 4:2:2 data streams and one other issue and therefore, since it doesn’t speak to luminance, it therefore allows a de facto standard of 4.5 ft/Lamberts.

That is as insane as saying that since the 3D standard doesn’t speak to issues of following the fire code, EXIT signs don’t need to be illuminated during 3D presentations. [DCI_Stereoscopic_DC_Addendum.pdf]

[……]

Read more

Tripping Over the Laser Light – Fantastic~!

There needs to be some stage setting before getting to the post-play-out conversation of Christie’s monumental effort of presenting Hugo at the IBC’s Monday Big Movie Night. So, before elaboration on the details: Hats off to Christie and hats off to lasers – Great Science, Great Movie, Great Effort, Great Presentation.

There are two important “everybody knows” issues that need eliminating before discussing the Christie effort. The first is to counter the wishful thinking that has morphed into a meme-life of its own. It gets stated by people who should know better and was even in an earlier slide presentation in the same auditorium on the same afternoon of the Hugo presentation.

The meme says: There is a SMPTE/ISO/DCI luminance standard for 2D presentations (48 candelas per square meter, or 14 foot-Lamberts), but the DCI 3D document only speaks to starting the sequence with the left eye, 4:2:2 data streams and one other issue and therefore, since it doesn’t speak to luminance, it therefore allows a de facto standard of 4.5 ft/Lamberts.

That is as insane as saying that since the 3D standard doesn’t speak to issues of following the fire code, EXIT signs don’t need to be illuminated during 3D presentations. [DCI_Stereoscopic_DC_Addendum.pdf]

[……]

Read more

[Update] LLE, Sony, NAB and CinemaCon

[Update] Nice demo. Bill Beck from Laser Light Engines gave a lot of background technical data which would be great to expand on later, since he was rushed to get the data in as well as play the demo reels.

The Sony demo reels were more than interesting. The LLE laser fibre was put into the Sony projector at the same place that the light from the Xenon bulb outputs. At the end people were overheard saying that they had never seen reds or purples so deep before, which makes sense since Beck had shown that the blue and red primaries chosen were significantly lower than usual. (The green primary was only slightly changed, a little higher on the CIE horseshoe.)

[……]

Read more

[Update] LLE, Sony, NAB and CinemaCon

[Update] Nice demo. Bill Beck from Laser Light Engines gave a lot of background technical data which would be great to expand on later, since he was rushed to get the data in as well as play the demo reels.

The Sony demo reels were more than interesting. The LLE laser fibre was put into the Sony projector at the same place that the light from the Xenon bulb outputs. At the end people were overheard saying that they had never seen reds or purples so deep before, which makes sense since Beck had shown that the blue and red primaries chosen were significantly lower than usual. (The green primary was only slightly changed, a little higher on the CIE horseshoe.)

[……]

Read more

KODAK Advances Lasers’ March on DCinema

One of the hassles in the background of converting digital cinema projectors from Xenon heat and light gobbling devices into elegant and refined reflectors of light amplified by stimulated emission of radiation (laser) is the fact that laser light has more safety restrictions. 

An industry group was formed late last year to work on redefining a laser used in cinema use away from the over-arching category defined by the U.S. Food and Drug Administration’s Center for Devices and Radiological Health, which is in charge of ensuring laser equipment safety. In the entertainment world, laser light shows were their previous concern, and each one had to get a special variance from the FDA. [Un-researched: how is this handled in the EU and other market areas?]

[……]

Read more

3Questions – Laser Light Engines

3Questions with LLE logoWhen we think of a digital cinema projector’s light path, we non-optical designers consider the lamp and reflector housing, the condenser lenses and prism assemblies, the DLP or LCOS chip themselves and the lens. There are obviously clever bits in between, for example the optics that will strip the UV and IR from the lamp, physical slits for the light to pass through, as well as techniques for balancing the lamp output for the proper levels of R, G and B.

There is a word that gets used by optics people – etendue – which points to certain characteristics of light that requires the balancing of quantity and angles in a manner that matches the most refined part of the system (in this case the DLP/LCOS device.) This etendue inherently restricts the ability to use more brut force on one end to get more quality light at the other end.

[……]

Read more

4K; And Then There Were Two

4K DLP chips are shipping today, according to the Texas Instruments Press Release. The three authorized OEMs, Barco, Christie and NEC will now be able to ship the digital cinema products which their catalogs now call 4K ready.

There is some data missing from the PR. For example, Barco is advertising that there are two sizes of 4K chips expected, one to match the 0.98″ C range projectors, and one to retrofit the 1.2″ B range projectors that they offer in their product line. (Christie and NEC only mention retrofitting the 1.2″ chip versions.) We believe that what TI has just released is the 1.38″ 4K chip, which will retrofit into the three 1.2″ positions in the larger Christie (CP2220 and CP2230) and NEC projectors and the B Series Barco projectors. [This has been confirmed–Editor]

[……]

Read more

Laser Light Engines gets IMAX funding– Putting Light on the Subject

Laser Light Engines LogoIMAX to Form Strategic Partnership With Laser Light Engines Through Equity Investment – Subtitle: Develop High Brightness Laser Light Technology Systems Exclusively for IMAX Digital Theatre Systems and Provide Additional Outsourced Research & Development for IMAX

The path to fully compliant digital cinema presentations is littered with ‘almost’ technologies which the studios allowed until looked aside from until the appropriate technology (one that actually met the spec) was commercially available. Examples of this are the transition from MPEG to Motion JPEG, and the transition from how security keys were handled 5 years ago and how they are handled today.

[……]

Read more