Welcome to Laser Pointer Forums - discuss green laser pointers, blue laser pointers, and all types of lasers

Buy Site Supporter Role (remove some ads) | LPF Donations

Links below open in new window

FrozenGate by Avery

New BDXL writers available at Frys






Drools
drool.gif
 
ok new writers cool i hope we can get more then 750 mW from those diodes
 
It would be nice to see what speeds they write. They could very well be 8X or 6X diodes which would not be uncommon for them use a less expensive diode since it will sell with the advantage of higher capacity. The extra layers don't require a stronger diode just that the diode can be used @ 4 different angles when writing as opposed to the 2 angels of the dual layer discs.
 
DTR said:
The extra layers don't require a stronger diode just that the diode can be used @ 4 different angles when writing as opposed to the 2 angels of the dual layer discs.
Click to expand...


Is that right? in this article Sharp Readies BD-100 Blu-ray Laser it says you do need higher powers to burn 4 layer discs? or am i reading it wrong? (probably) :)
 
ped said:
Is that right? in this article Sharp Readies BD-100 Blu-ray Laser it says you do need higher powers to burn 4 layer discs? or am i reading it wrong? (probably) :)
Click to expand...

Well it is the way I understand it but I hope I am wrong.:o Also the specs of the player says that it will write a single layer @ only 6X but they will for sure try to get the early adopters to buy in and then come out with a faster drive to get everyone to upgrade.:mad:

I would say the drive for the higher power diodes is there because of the higher capacity. It will take a lot longer to burn a quad layer disk as a dual layer with any given speed so I am sure they want to eventually come out with faster drives so you are not waiting all day to burn a disk. But I am pretty sure the quad layer does not require a faster drive it is just advantageous to have faster write speeds.
 
Last edited:
Wonder how hard it would be to make a drive which could burn 4 layers at the same time?

Presumably the inter-layer distance would be constant so the optics would need to be able to focus at multiple points within the disk but the rest of the optics would be similar.

-A
 
This is one manufacturers quote on the laser diode required:

At the 70th Autumn Meeting of the Japan Society of Applied Physics being held this week, Sharp announced that they have successfully created a Blu-ray laser diode which operates at a maximum of 500mW, enough to burn four-layer Blu-ray discs. This would allow for, when approved by the Blu-ray Disc Association (BDA), Blu-ray discs with either 75GB or 100GB capacities.
Click to expand...

LarryDFW
 
Last edited:
500mW ratings from manufacturers =/= 500mW on LPF ;)

I'm fairly certain (though correct me if this is wrong) that current 12x diodes are "rated" by the manufacturers for somewhere around 300 or 350mW. I saw a chart somewhere a while back. Since we get in practice 700mW+ from current 12x, a diode rated for 500mW might be able to peak near 1W if the ratio holds up.
 
The Sanyo diodes used in the 12X burners are rated for 450mW

The Sharp diodes used in this BDXL burner is rated at 500mW

The 12X speed limit is caused by the wobble created at such a high speed, NOT the power of the diode.

We may get more out of this diode (500mW) than the 12X (450mW), but I wouldn't look for it to be "dramatic."

Will we reach that "magic" 1W barrier?

Someone needs to take the chance ;)

Peace,
dave
 
You must log in or register to reply here.


Back
Top