Note: Additional photos are printed in Jeff's setup manual! |
![](blackboard/img/laser_detector_setup.gif)
Schematic
|
![SOL setup](img/sol-2021a.JPG)
Fall 2021 setup: Glass slide (vertical), Fresnel lens (in frame);
FreeView run in admin account (jahncke_lab)
|
![SOL setup 2014](img/sol_setup2014a.jpg)
Laser, detector 1, beam splitter, power supply,
(old) function generator, Fresnel lens in frame |
![SOL setup](img/sol-2021c.JPG)
Settings for Gw Instek function generator |
![SOL setup](img/sol-2021d.JPG)
Note that BNC cable from laser now connects to the
TTL/CMOS Output terminal on the rear of the Gw Instek function generator |
![SOL setup](img/SOL-NewLaser1.jpg)
Connection of new (2018) laser to power supply and
(old) function generator. Note that the BNC cable
now connects to the
TTL/CMOS Output terminal on the rear of the Gw Instek function generator |
![SOL setup](img/SOL-NewLaser2.jpg)
Detail of new laser (2018) |
![SOL setup](img/SOL-NewLaser3.jpg)
Connections to power supply. Stick bare connections in plastic bag
to prevent shorting against optical table |
![SOL setup 2014](img/sol_setup2014b.jpg)
Fresnel lens in frame, function generator, oscilloscope,
laptop, detector
2 |
![SOL setup 2014](img/sol_setup2014c.jpg)
FreeView on laptop:
v = {2(68 m) + 1 m}/460 ns = 2.98x108 m/s ⇒ 0.7%! |
![SOL setup 2014](img/sol-2021b.JPG)
Note that 460 ns is the sweet spot. From Fall 2021:
v = {2(68 m) + 1 m}/480 ns = 2.85x108 m/s ⇒ 5%! |
![SOL setup 2017 SOL setup 2017](img/sol-trundle_stand1.JPG)
Trundle wheel stand |
![SOL setup 2017 SOL setup 2017](img/sol-trundle_stand2.JPG)
Trundle wheel at rest on stand |
Old setup photos from 2007 – still has useful details |
![CJ](img/sol_setup2007-01.jpg)
Assemble a 'laser shield' since laser isn't turned off between groups |
![](img/sol_setup2007-02.jpg)
Attach a piece of 3-hole punch cardboard to a pendulum clamp |
![CJ](img/sol_setup2007-03.jpg)
The outer screws fit through 2 holes; reverse the middle screw so it doesn't get lost |
![](img/sol_setup2007-04.jpg)
The laser shield in action. Leave laser turned on between groups. |
![CJ](img/sol_setup2007-05.jpg)
Detail of detector 1, beam splitter and laser |
![](img/sol_setup2007-06.jpg)
Detail of laser and beam splitter |
![CJ](img/sol_setup2007-07.jpg)
Function generator settings: Square wave (formerly used Sine), 100K,
~20 on display;
wire from laser is connected to TTL/CMOS BNC connector |
![](img/sol_setup2007-08.jpg)
The (old) laser connection to the function generator |
![CJ](img/sol_setup2007-09.jpg)
Connection of laser to ±15 v power supply |
![CJ](img/sol_setup2007-11.jpg)
Beam splitter detail |
![](img/sol_setup2007-12.jpg)
Detectors 1 & 2 connected to oscilloscope |
![CJ](img/sol_setup2007-13.jpg)
For each connection, use a BNC T-connector, and attach a
double-banana-to-BNC adapter. Each adapter has a
10 kΩ {brown-black-orange} resistor attached. |
![CJ](img/sol_setup2007-15.jpg)
Detector 2 |
![](img/sol_setup2007-32.jpg)
Switch on detector; turn off between runs to save the battery! |
![CJ](img/sol_setup2007-17.jpg)
Put trundle wheel under the cart |
![](img/sol_setup2007-18.jpg)
The trundle wheel |
![](img/sol_setup2007-20.jpg)
Drawers where the tinker toys for the bread board are stored |
![](img/sol_setup2007-22.jpg)
Most of the bread board stuff is in "Optical Mounts" |
![CJ](img/sol_setup2007-19.jpg)
Box of bolts for tinker toys |
![CJ](img/sol_setup2007-21.jpg)
Box 'o bolts |
![CJ](img/sol_setup2007-23.jpg)
Tinker toys |
![CJ](img/sol_setup2007-31.jpg)
You'll need an Allen key to tighten bolts on bread board |
![](img/sol_setup2007-34.jpg)
Laser focusing tool, used to tune laser appearance, if needed |
![](img/sol_setup2007-16.jpg)
Use a power strip to connect all electrical components;
a long extension cord is need to reach the nearest outlet |
Older setup photos from 2005 – still useful? |
![CJ](img/sol1.jpg)
Professor Jahncke ponders the setup.
Note that the bread board sits on a lab cart. |
![](img/sol2.jpg)
The Fresnel lens, laser, beam splitter and detector |
![](img/sol3.jpg)
Side view |
![](img/sol5.jpg)
Function generator, DC power supply |
![](img/sol6.jpg)
Storage scope |
![](img/sol4.jpg)
The corner cube is placed at the other end
of the hallway, illuminated by laser |
![](img/sol9.jpg)
The corner cube
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![](img/sol8.jpg)
Illuminated by the flash!
|