1. PRESENTED BY:
K.SNEHA
ROLL NO. 08Q61A0530

2.  INTRODUCTION
 HISTORY
 WORKING PROCESS
 TECHNOLOGIES
 ADVANTAGES AND DISADVANTAGES
 CONCLUSION

3.  Blue laser is a laser that emits electromagnetic
radiation
 The blue laser has a wavelength of 505 nanometers.
 Blu-ray has been developed for the manufacture of
blue laser optical disc technology.
 In the blue laser technology, the special material is
gallium nitride.
 The application of lasers range from the
Optoelectronic data storage to medical applications.

4.  Inventing blue-laser technology
◦ Red Lasers
◦ 1992 - first efficient blue LED,
◦ Early 1990’s gallium nitride crystals more effective
◦ 1996- first blue laser - sapphire substrate
◦ 1999 - Polish crystals – Lasers twice the yield and
10 times the life
◦ late 1990s blue lasers were large and expensive gas
laser instruments
◦ In 2000s blue laser with 60 mW of power,

5. WORKING PROCESS

6.  Blue laser pointers became available around
2006
 same basic construction as DPSS green lasers.
 commonly emit light at 473 nm which is
produced by frequency doubling of 946 nm
laser radiation from a diode-pumped Nd:YAG
or Nd:YVO4 crystal.
 Blue lasers can also be fabricated directly with
InGaN semiconductors, which produce blue
light without frequency-doubling.

7.  445 nm blue laser diodes are currently
available on the open market.
 The devices are brighter than the 405 nm
laser diodes
 Violet lasers may be constructed directly with
GaN (gallium nitride) semiconductors.
 As with all high powered lasers, such devices
are able to pop balloons and light matches.

8.  The violet 405 nm laser (whether constructed
from GaN or frequency-doubled GaAs laser
diodes) is not in fact blue, but appears to the eye
as violet, a color for which a human eye has a
very limited sensitivity.
 When pointed at many white objects (such as
white paper or white clothes which have been
washed in certain washing powders) the visual
appearance of the laser dot changes from violet
to blue, due actually to fluorescence from
brightening dyes.
 Many companies have demonstrated devices
working at only slightly shorter wavelengths:
480–500 nm.

9.  Large recording capacity up to 27GB
 High-speed data transfer rate 36Mbps

10.  More amount of data than red laser
 same amount of surface of 120 mmdisc
 As perfect as your cd may be
the surface is never 100% flat.
 even IF the surface was 100% flat,
the disc spins.

11. Technologies

12.  Even organizations such as NASA, the Census
Bureau, and many others have lost stored data.
 They forgot one major component: technical
evolution.
 They didn't envision one or more components
becoming obsolete and ultimately affecting the
readability of their data.
 All organizations, whether archiving for historical
preservation or complying with storage
regulations, should avoid using short-term fixes
for long-term problems and should choose a
technology with a proven history and a solid
growth path to the future.

13.  laser light with 12 in 1 attachment
 Four In One Pen, Laser pointer,
LED Light and Pointer
 HP LaserJet 1022N Network Ready Mono
Laser Printer
 HP Color Laserjet 2600N Netowrk Ready
Laser Printer

14.  Advantages:
 With up to 50GB of storage space on a dual-
layer disc, Blu-rays have five times the
storage capacity of a DVD.
 . Another advantage of this amount of
storage capacity is that a Blu-ray disc will be
able to support the next level of technology:
3-D content.
 Backwards Compatibility
 Audio and Picture Quality
 Cost

15.  Cost : . Blu-ray players cost more than standard and
HD-DVD counterparts, even though prices have
dropped steadily.
 Capacity :
While Blu-ray discs offer more storage space on a
disc than standard DVD’s.
• Movie Availability.
• DRM: Although Blu-ray offers a nice picture and
high-definition experience crisp beyond comparison,
the Digital Rights Management limits the availability
of certain features. Although Blu-ray offers a nice
picture and high-definition experience crisp beyond
comparison, the Digital Rights Management limits the
availability of certain features.

16.  Blu-Laser is very cool technology. It takes the
DVD-Technology one step further, basically
by just using a smaller laser with a nice color.
 The DVD has gained in popularity, but the
various formats and sizes have made the
professional user of DVD-recorders gone
mad already.
 same technology in CD and DVD players will
provide a dramatic breakthrough in storage
capability without an increase in device size.