David Lockwood's memories from the 1960s

David says, "The first three photos are from my MSc Thesis completed in 1964. The experiments in the Thesis were aimed at examining the effects of sound waves on colloids, which are very small particles that are found in clays for example (for more details see page 181 of http://www.cap.ca/PiC-PaC/static/downloads/1efdc1f3784b85c1a1b33e396b91ee8aef207...). In fact, I was looking at nanoparticles of matter, which preceded the emergence of nanotechnology as a field of research by more than two decades. I needed a suitable light source to probe the alignment of the nanoparticles in the ultrasonic sound field. At that time the laser had just been invented and I realized that this was the ideal light source for my experiment. I then proceeded to construct the first home-built laser in New Zealand. This laser - a He-Ne continuous-wave gas laser - operated at 632.8 nm (in the red). This laser, over a metre long, is shown in the black-and-white photo. There were lot of problems to be overcome, but eventually, with invaluable help from Dr. Tom Seed (my MSc supervisor) and Dr. Rod Syme, I had it working. The colour photos show the complete experimental system, including the horn-shaped acoustic chamber in front and the operating laser in the rear, and a typical optical diffraction pattern obtained from the original red laser beam arising from a grating structure formed by the alignment of a colloid under the influence of a travelling sound wave.
"The other two photos are from my PhD Thesis completed in 1969 under the supervision of Professor Alister McLellan. This thesis is concerned with setting up the first computer-controlled laser Raman spectroscopy equipment (shown in one photo - that's me wearing the laser safety goggles) in New Zealand and using it to measure the vibrational spectrum of novel materials grown in the Physics Department. It is very likely that my setup was also the first in the Southern Hemisphere. In contrast to the He-Ne laser I developed for my MSc thesis, the laser I used was one of the first commercial lasers - an argon gas laser (shown in the other photo) that required frequent painstaking maintenance. This was because the He-Ne gas laser did not produce enough power for my experiments.
"Incidentally, the specially chosen date when I completed my PhD Thesis was 21 July 1969, which marked the day (20 July 1969 in the USA) that Neil Armstrong was the first human being to walk on the moon. It was my great fortune and a pleasure for me to later meet Armstrong following a lecture he gave at the University of Edinburgh on 10 March 1972."

Last updated
10:51am 13th November 2017
Type
Collection
Identifier
qsr-collection:22005

Contains 7 items


Cover page of David Lockwood's MSc thesis, The Action of a Sound Field on Colloids
Cover page of David Lockwood's MSc thesis, The Action of a Sound Field on Colloids
A scanned copy of the cover page of a theis written by David Lockwood for an MSc in Physics at the University of Canterbury. The thesis is titled "The Action of a Sound Field on Colloids" and was submitted in 1964.
Photograph of New Zealand's first laser
Photograph of New Zealand's first laser
A scanned copy of a black and white photograph of the He-Ne Continuous Gas Laser used in David Lockwood's MSc research at the University of Canterbury. David says, "The experiments in the Thesis were aimed at examining the effects of sound waves on colloids, which are very small particles that are found in clays for example (for more details see page 181 of http://www.cap.ca/PiC-PaC/static/downloads/1efdc1f3784b85c1a1b33e396b91ee8aef2072c5.pdf ). In fact, I was looking at nanoparticles of matter, which preceded the emergence of nanotechnology as a field of research by more than two decades. I needed a suitable light source to probe the alignment of the nanoparticles in the ultrasonic sound field. At that time the laser had just been invented and I realized that this was the ideal light source for my experiment. I then proceeded to construct the first home-built laser in New Zealand. This laser - a He-Ne continuous-wave gas laser - operated at 632.8 nm (in the red). This laser, over a metre long, is shown in the black-and-white photo. There were lot of problems to be overcome, but eventually, with invaluable help from Dr. Tom Seed (my MSc supervisor) and Dr. Rod Syme, I had it working".
Photograph of New Zealand's first laser in action
Photograph of New Zealand's first laser in action
A scanned copy of a photograph of the He-Ne Continuous Gas Laser used in David Lockwood's MSc research at the University of Canterbury. David explains that the photograph shows "the complete experimental system, including the horn-shaped acoustic chamber in front and the operating laser in the rear".
Photograph of an optical diffraction pattern obtained in the experiment
Photograph of an optical diffraction pattern obtained in the experiment
A scanned copy of a photograph of an optical diffraction pattern produced by the He-Ne Continuous Gas Laser used in David Lockwood's MSc research at the University of Canterbury. David explains that the photograph shows "a typical optical diffraction pattern obtained from the original red laser beam arising from a grating structure formed by the alignment of a colloid under the influence of a travelling sound wave".
Cover page of David Lockwood's PhD thesis, Solid State Studies: Raman Spectroscopy and the Lattice Vibrations of CdCl2 and CdBr2.
Cover page of David Lockwood's PhD thesis, Solid State Studies: Raman Spectroscopy and the Lattice Vibrations of CdCl2 and CdBr2.
A scanned copy of the cover page of a thesis written by David Lockwood for a PhD in Physics at the University of Canterbury. The thesis is titled "Solid State Studies: Raman Spectroscopy and the Lattice Vibrations of CdCl2 and CdBr2" and was submitted in 1969.
Photograph of David Lockwood with New Zealand's first laser Raman spectroscope
Photograph of David Lockwood with New Zealand's first laser Raman spectroscope
A scanned copy of a black and white photograph of David Lockwood standing beside the computer-controlled laser Raman spectroscopy equipment he used for his PhD research at the University of Canterbury. David says, "This thesis is concerned with setting up the first computer-controlled laser Raman spectroscopy equipment (shown in one photo - that's me wearing the laser safety goggles) in New Zealand and using it to measure the vibrational spectrum of novel materials grown in the Physics Department. It is very likely that my setup was also the first in the Southern Hemisphere".
Photograph of argon gas laser
Photograph of argon gas laser
A scanned copy of a black and white photograph of the argon gas laser used by David Lockwood in his PhD research at the University of Canterbury. David says, "In contrast to the He-Ne laser I developed for my MSc thesis, the laser I used was one of the first commercial lasers - an argon gas laser that required frequent painstaking maintenance. This was because the He-Ne gas laser did not produce enough power for my experiments".