Going Postal
MENU
  • Home ►
    • Contact
    • Privacy Policy
    • Blog
  • Politics ►
    • Authoritarianism
    • Capitalism
    • Communism
    • Conservatives
    • Elections
    • European Union
    • Labour
    • Peace
    • Socialism
    • Terrorism
    • War
    • US
  • Economics ►
    • Business
    • Finance
    • Trading
  • Science ►
    • Engineering
    • Geology
    • Health
    • Physics
    • Mathematics
    • Space
    • Technology
  • History ►
    • English Civil War
    • 18th Century
    • 19th Century
    • 20th Century
    • WW I
    • WW II
    • The Cold War
  • Literature ►
    • Biography
    • Book Reviews
    • Fiction
    • Mystery
    • Poetry
    • Satire
    • Thriller
  • Forums ►
    • Campaigning
    • Competitions
    • Culture
    • Current Affairs
    • Elections
    • GP Events
    • Media Shows & Appearances
    • Publishing
    • Welcome
  • Merchandise ►
    • Trump Mugs and Tee Shirts
    • Custom Mug
    • GP Mugs
    • GP Coasters
    • GP Books
    • GP Keyrings
  • Home
    • Contact
    • Privacy Policy
    • Blog
  • Politics
    • Authoritarianism
    • Capitalism
    • Communism
    • Conservatives
    • Elections
    • European Union
    • Labour
    • Peace
    • Socialism
    • Terrorism
    • War
    • US
  • Economics
    • Business
    • Finance
    • Trading
  • Science
    • Engineering
    • Geology
    • Health
    • Physics
    • Mathematics
    • Space
    • Technology
  • History
    • English Civil War
    • 18th Century
    • 19th Century
    • 20th Century
    • WW I
    • WW II
    • The Cold War
  • Literature
    • Biography
    • Book Reviews
    • Fiction
    • Mystery
    • Poetry
    • Satire
    • Thriller
  • Forums
    • Campaigning
    • Competitions
    • Culture
    • Current Affairs
    • Elections
    • GP Events
    • Media Shows & Appearances
    • Publishing
    • Welcome
  • Merchandise
    • Trump Mugs and Tee Shirts
    • Custom Mug
    • GP Mugs
    • GP Coasters
    • GP Books
    • GP Keyrings

The ruby laser

Doc Mike Finnley, Going Postal
20th Century

Happy Birthday, Ruby!

16th May 2020 Doc Mike Finnley 2252 Comments

Above photo: My ruby laser with a ‘mirror alignment laser’ just off to the right hand side of the photo. A small amount of smoke in the air makes the alignment laser-beam visible. In the [more…]

Engineering

Making A Ruby Laser – Part Five

25th September 2018 Doc Mike Finnley 2823 Comments

Melting a hole through steel: The above image needs a little explanation! The Doc messed up his camera settings and under exposed the image. So I loaded it into Gimp and played with the curves [more…]

Engineering

Making A Ruby Laser – Part Four

11th September 2018 Doc Mike Finnley 1856 Comments

The Doc’s ruby laser focused onto a lighter flint. The flint has been glued to the end of a match stick. The ‘explosion’ measures approximately 4 inches diameter. Interesting things to note are the ‘candy [more…]

Engineering

Making A Ruby Laser – Part Three

14th August 2018 Doc Mike Finnley 2666 Comments

More information on laser speckle can be found here:  Speckle pattern A Mirror Alignment Tool The most important part of constructing a ruby laser (or any laser with external mirrors) are getting the mirrors alligned [more…]

Dr Mike Finnley, Going Postal
Engineering

Making A Ruby Laser – Part Two

31st July 2018 Doc Mike Finnley 2178 Comments

(a ruby rod lit by two bright blue LEDs. Due to the IR filter in my camera the pink colour is actually red. What you are seeing is the absorption of the blue light and the [more…]

Engineering

Making A Ruby Laser – Part One

21st July 2018 Doc Mike Finnley 1750 Comments

Introduction For many years the Doc has had the desire to attempt the construction of a ruby laser. After six months of hard work, disappointment, late nights, lots of booze and a drained bank account [more…]

Latest Articles

  • Playing With Electricity – Part 4
    9th July 2025 1862 Comments
  • Tax, Tax, Tax
    9th July 2025 1982 Comments
  • A (Burts’ Eye)View From The Greenhouse; What’s Anglo-futurism, When It’s All At Home?
    8th July 2025 2096 Comments
  • From Socialism to Welfarism: the Betrayal of the Working Class
    8th July 2025 2499 Comments
  • Cine Film Conversion
    Digitising Old Cine Films
    7th July 2025 1986 Comments
  • International Trade
    7th July 2025 2094 Comments
  • Embers of The Affair, Part Two
    6th July 2025 1918 Comments

GP on Twitter

Tweets by GoingPostalBlog

Elsewhere on GP

  • Captain Panick, Going Postal

    Off to prison under Military aid to the Civil Authorities (MACA)

    24th July 2020 3876 Comments
    Let me start at the beginning of my knowledge. I spent my 21st Birthday in Prison. A simple statement. Mind you, as I had spent my 19th Birthday at the Royal Military Academy Sandhurst, my [more...]
  • Kafka traps and Gish galloping

    20th October 2021 4333 Comments
    These are the ways many of  the people you see in the media and politics lie and try to deceive you, not all but an awful lot of them come from the left unsurprisingly. First [more...]
  • Jinnie’s Story – Book Two, Chapter Twenty Two

    19th November 2021 2918 Comments
    My earliest memories of life are living with my Mother Cat and the rest of my litter in a nest in an old factory off what I now know was the Old Kent Road. Mother [more...]
  • Larry’s Diary, Week Eighty One

    21st February 2021 2232 Comments
    Monday Morning all and what a horrible one, snow in the garden and it’s cold out there. I shall be only venturing out when forced to by my bladder or bowels and then for as [more...]
  • Postcard From Summer 1954, Part Six – Rhyl

    2nd December 2021 3705 Comments
    In 1954, the Manchester Evening News launched a “Special Investigation” and tasked my uncle, John Alldridge, with answering the question – Holidaymakers, do you get value for your MONEY? What follows is his report on [more...]

Articles by Author

  • 70s_girl
  • 1642again
  • 10210ken
  • Æthelberht
  • Alexsandr too
  • Always Worth Saying
  • Ancient Mariner
  • Ang Ryman
  • Annie Dee
  • AW Kamau
  • Bark Kantatas
  • Barbican
  • Bassman
  • Bergen
  • Beware of Geeks bearing GIFs
  • Bill Quango MP
  • Blown Periphery
  • Bobo
  • Chrissie
  • Churchills Shark
  • Colin Cross
  • Colliemum
  • Columba Palumbus
  • Cynic
  • Dalester
  • DH
  • Dixie
  • DJM
  • Dorset Knob
  • Doxie
  • Dr Mike Finnley
  • EJ – Wankpuffin
  • El Cnutador
  • Emile Woolf
  • Eraser of Love
  • Foxoles
  • Gillygangle
  • Gmbd
  • Godfrey Bloom
  • Grimy Miner
  • GrumpyAngler
  • Guardian Council
  • Ivory Cutlery
  • James Dalton
  • Jethro
  • Jerry F
  • Jerry Mandarin
  • JimmySP
  • Jim Walshe
  • Joe Slater
  • Joe Williams
  • John Booth
  • John Tull
  • Jonathon Davies
  • Judas was paid
  • Katabasis
  • Kent
  • Kipper
  • LetEnglandShake
  • Lugosi
  • Madam Revenant
  • Martin Mezger
  • Mr QM
  • Nautilus
  • NeverUpToTheJob
  • Noix
  • Northern man
  • Oddanatomy
  • OldTrout
  • Ozymandias
  • Paul Wicker
  • Phil the test manager
  • Rat Catcher
  • RedBudgie
  • Reggie
  • Roger Ackroyd
  • Rookwood
  • Ross
  • SharpieType301
  • Shibusa
  • Sunshine & Showers
  • Sweaty Dave
  • Tachybaptus
  • The Black Swan
  • The Buttscratcher Jimmy
  • Tom Pudding
  • Verax Cincinnatus
  • Viciousbutfair
  • Vir Cantium
  • \/()43 |_|K19
  • well_chuffed
  • William
  • WorthingGooner
  • Wycombewanderer

Archives

Contribute to GP

If you wish to make a contribution small and often would be preferable. Paypal accepts all sorts of payment methods.




In Pictures

  • Cine Film Conversion
Meta
  • Log in
  • Entries feed
  • Comments feed
  • WordPress.org
Sitemap
  • Home
  • Bash 2025
  • About
  • Contact
  • Support and Subscriptions
  • Moderation philosophy and policy
  • Privacy Policy
  • Disqus Help Page

Copyright © 2025 | MH Magazine WordPress Theme by MH Themes