Frank DeFreitas Holography | Allentown, PA | Phone: 610-770-0341
What Are Lasers Used For?
Updated 21 Oct. 2013
Hologram of the Cross from holoworld.com on GodTube.
ABOVE: This short video will show you how you can see a hologram from different sides, as if you were looking at the real object!
Lasers, Holograms & Photonics:
Lasers, Holograms & Photonics
A Student Study Guide
Here is a 15-page "primer" study guide (PDF format) that will give students a good foundation with lasers, holography and the field of photonics. It provides definitions, a timeline of events, biographies of inventors, along with current and future applications. The future is made of light, and those who are able to understand and work with light will pave the way for the photonics-based communication technologies superhighway. You will need the Adobe Acrobat PDF reader for this file.
Hello. My name is Frank DeFreitas and I saw my first laser beam in 1968 (I was in the 8th grade). If you'd like to learn about how lasers are used today, you've come to the right web page! Since there is plenty of information elsewhere on the history of the laser and how they work, I will not duplicate that info. here on this page.
So, let's get right to the l-o-n-g list of what lasers are used for. You have my permission to print out this list for reports and homework.
If you're an educator, you may wish to assign several of the listed uses to students, and have them report on how lasers are used with them.
Note: I'm certain that this list is not complete, and it will always continue to grow. If you know of yet another use of lasers (to add to the list), please contact me and I'll make sure it gets posted in a future update.
What Lasers are Used For:
Repairing detached retinas
Reading product codes on groceries
Recording and playing CDs & DVDs
Cutting fabric for clothes
Drilling holes in metal
Transmitting telephone calls and data
Sounding the atmosphere
Characterizing surface roughness
Measuring air pollution
Defining the meter
Slowing atomic beams
Printing computer data
Measuring the earth-moon distance
Cutting airplane parts
Transmitting news wirephotos
Aligning precision machinery
Controlling tunnel machinery
Configuring massive telescopes
Designating military targets
Aligning sawmill cuts
Monitoring polar ice caps
Measuring airplane velocity
Looking for gravitational radiation
Installing acoustical ceilings
Read / write data storage
Aiding robotic vision
Positioning medical patients
Probing genetic material
Illuminating fluid flow
Enlarging color photographs
Creating laser light art
Powering optical computers
Analyzing auto exhaust
Laser Micro Holography
Holograms are not just about 3D images. When holography was invented, the 3D aspect was a "side-effect" not a main objective. Holography was invented as an improvement to electron microscopy. The REAL future of holography will be its many technical applications. Here are a few of my recent projects utilizing laser holograms in a slightly different than usual way:
Introduction to Micro Holography
Here is an introductory 12-page PDF file with photos that gives a bit of history behind holograpic microscopy (going back to the 1960s). I wrote this for the British online magazine Micscape for September 2013. You will need the Adobe PDF reader in order to read this document.
The Hologram Bible
The Hologram Bible contains all 1,245 individual pages, and 773,746 words of the King James Bible. It is the size of an average snowflake. Its mission is to safely bring Scripture to areas of the world where the Christian Holy Bible is banned via laser micro holography / steganography. Its size is just the beginning of what makes it different from every other Bible in the world today.
World's Smallest Lord's Prayer
Is this laser hologram the 'Greatest Hologram on Earth
'? The size of a single human hair, I propose that this is the world's smallest rendition of the Lord's Prayer. It contains its own magnification optics encoded into the hologram itself, and is also part of my micro hologram / steganography research. I also include historical information on more than a century of optical scientists, engravers and others that have pursued making the world's smallest Lord's Prayer. Reported in many top newspapers across the USA in Sept. 2013.