holography

Views:
 
     
 

Presentation Description

No description available.

Comments

By: dipesh12369 (36 month(s) ago)

send me this ppt on my mail id kayasth_dipesh@yahoo.in.........pls

By: vermatiet (43 month(s) ago)

Dear Readers i maid my ppt public and now u can download it. thanks for your comments...

By: maheshg93 (43 month(s) ago)

pls send me this ppt to my mail id maheshg93@gmail.com.......pls urgent

By: Asreeram (44 month(s) ago)

hi sir send me this ppt to my email id is sreeramulu08@gmail.com

By: KyockLee123 (46 month(s) ago)

Can you upload it or send it to me? Please?

See all

Presentation Transcript

Holography : 

1 Holography Fri.Nov.17, 2007 Presented by: Manjit verma

Holography: Means : 

2 Holography: Means Holography (from the Greek, whole + write) is the science of producing holograms It is an advanced form of photography that allows an image to be recorded in three dimensions. The technique of holography can also be used to optically store, retrieve, and process information.

History of Holography : 

3 History of Holography Invented in 1948 by Dennis Gabor for use in electron microscopy, before the invention of the laser Leith and Upatnieks (1962) applied laser light to holography.

Conventional vs. Holographic photography : 

4 Conventional vs. Holographic photography Conventional: 2-d version of a 3-d scene Photograph lacks depth perception Film sensitive only to radiant energy Phase relation (i.e. interference) are lost

Conventional vs. Holographic photography : 

5 Conventional vs. Holographic photography Hologram: Freezes the intricate wavefront of light that carries all the visual information of the scene To view a hologram, the wavefront is reconstructed View what we would have seen if present at the original scene through the window defined by the hologram Provides depth perception

Hologram properties : 

6 Hologram properties If you look at these holograms from different angles, you see objects from different perspectives, just like you would if you were looking at a real object They usually just look like sparkly pictures or smears of color If you cut one in half, each half contains whole views of the entire holographic image.

Hologram properties : 

7 Hologram properties

Hologram construction : 

8 Hologram construction Laser : Red lasers, usually helium-neon (HeNe) lasers, are common in holography Beam splitter: This is a device that uses mirrors and prisms to split one beam of light into two beams. Mirrors: These direct the beams of light to the correct locations.

Hologram construction : 

9 Hologram construction Holographic film: Holographic film can record light at a very high resolution, which is necessary for creating a hologram. It's a layer of light-sensitive compounds on a transparent surface, like photographic film.

Hologram working : 

10 Hologram working

Hologram reconstruction : 

11 Hologram reconstruction

Why Laser ? : 

12 Why Laser ? Lasers produce monochromatic light -- it has one wavelength and one color. Because of the need for coherent interference between the reference and object beams

Hologram: Some Applications : 

13 Hologram: Some Applications Authentication. Virtual Display.

HOLOGRAM: AUTHENTICATION : 

14 HOLOGRAM: AUTHENTICATION Identicard. Passport. Sticker or Tag.

IDENTICARD: : 

15 IDENTICARD:

PASSPORT: : 

16 PASSPORT:

STICKERS: : 

17 STICKERS:

WHY HOLOGRAM FOR AUTHENTICATION: : 

18 WHY HOLOGRAM FOR AUTHENTICATION: Hologram stickers cannot be scanned or photocopied . Hologram stickers can also create a unique and attractive complement to your existing packaging and product.

Virtual Display: : 

19 Virtual Display: Sci-fic movies. For trade-show booths. Museums display .

SCI-FIC MOVIES: : 

20 SCI-FIC MOVIES:

For trade-show booths: : 

21 For trade-show booths:

MUSEUM DISPLAY: : 

22 MUSEUM DISPLAY:

Slide 23: 

23 THANKS welcome for queries