View allAll Photos Tagged laserpointer
This 3D-printable stand uses a ball-joint principle to hold most commonly available flashlights, laser pointers, USB microscopes, etc.
To assemble the stand you only need two rubber bands.
The 3D-files are designed to be 3D-printed easily without support structures.
Note that the base has small screw holes on the bottom where rubber feet or ring magnets can be attached.
By rotating the ball-joint and sliding the base on a tabletop, most desirable angles can be achieve for casting light on workpiece.
DOWNLOAD THE 3D FILES
- www.thingiverse.com/thing:1017689
- pinshape.com/items/9964-3d-printed-universal-3d-printable...
- youmagine.com/designs/universal-3d-printable-flashlight-s...
This 3D-printable stand uses a ball-joint principle to hold most commonly available flashlights, laser pointers, USB microscopes, etc.
To assemble the stand you only need two rubber bands.
The 3D-files are designed to be 3D-printed easily without support structures.
Note that the base has small screw holes on the bottom where rubber feet or ring magnets can be attached.
By rotating the ball-joint and sliding the base on a tabletop, most desirable angles can be achieve for casting light on workpiece.
DOWNLOAD THE 3D FILES
- www.thingiverse.com/thing:1017689
- pinshape.com/items/9964-3d-printed-universal-3d-printable...
- youmagine.com/designs/universal-3d-printable-flashlight-s...
I needed some way to attach a laser pointer to my William Optics GTF102mm Telescope. I printed one out using a 3D printer with a Dovetail mount. All I need now is clear skies. More information at www.brisbane3dprinting.com.au
Docent tour of American Art, showing is "Autumn--On the Hudson River" from 1860 by Jasper Francis Cropsey. I want to be inside this painting. It's glorious.
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Last week, 40 students from Northern California public high schools spent the week at SLAC, learning about the work and lifestyles of scientists and engineers at national laboratories, as part of the second annual SLAC Accelerating Girls’ Engagement in STEM (SAGE-S) summer camp.
Photo: Jacqueline Orrell / SLAC
Flickr Meet, light painting group meeting in Jing An Park Shanghai.
Since it's my first light painting experience I needed to try different things. Here just playing with the laser pointer...
wayne thought it'd be a good idea to give a bunch of drunk people laser pointers. though i and everyone else onstage were blinded, the photos came out cool.
built a controllable laser pointer!
it consits of a 5v laser module and two servo motors hold together by zip ties and is controlled trough a pololu serial 8-bit servo controller by some python code.
the laser module is simply switched trough the serial ports DTR line, that gives pulses as fast as the serial connection speed.
very unstable thing, but good enough to draw some crappy pictures on walls by taking long exposures (check the exif tags)!
its not easy to speed this thing up since you soon come to the point where you have to calculate the timing of your laser pulses with estimated servo speed and momentum. physics, basically, but i ran out of time to develop it really into someting. next try maybe with an arduino and some realtime assembler code..
Here I have used a Schneider Linhof 105/3.5 as detector lens. The lens is a recup from an old shutter. I have maked a new adaptor and put a Nikon F-mount on the other side so I can use him on my standard lens interface. See:
www.flickr.com/photos/fotoopa_hs/7703402018/
Now a green 10 mW laserpointer is used instead of the red 1 mW pointer. The difference is clearly, there are 6 pixels illuminated with this lens and 4 pixels have the max sensor value.
The integration time here is 71.3 us. If need I can use a shorter time as long as the ambient light is not to high, there is no problem. The green laser gives much more output despite he is not optimal in the pass band from the TSL202R line array sensor.
Extra test results:
Depth resolution 1 pixel array shift = 0.416mm object change in depth at 600mm distance ( D300 camera sensor distance). D300 Camera frame = 82 mm.
DOF at 600mm, Macro lens AF105/2.8D, F18 = 19.4 mm = 46 array pixels
The TSL202R line array is 128 pixels. This means that any signal from -23 to +23 pixels from the centre may give detection, or in focus pictures. A very nice range for detection.
This means also, I can readout the other pixels at a higher data rate as I do no make the ADC convertion (take most time) due to the fact that they are out focus. Just in case of focus detection no speed or direction. ( The max speed is only need if the ambient light is very high so the line array readout a to high level from direct sunlight. I have to test this level next days but just now at 71 us integration time the level seens to be very low.
This primair algorithme is very easy to implement as first test. just look if any readout into the DOF range zone to trigger the cameras.
1KW halogeen lamp pointed to the object test card.
2 strips black cardboard are used to view the level difference between withe and black background. The red laserpointer is near the centre and give a saturated piek level. The laser has only 1 full pixel exposed and a second only a small part. Even with 1 KW at 40 cm from the object, the laserpointer show clear the position.
If the laserpointer and linesensor are calibrated, the ideal focus position give the peak signal correct into the centre. The level is not important even is saturated, only the position. The offset give a precise value where the limiets are for out focus and give the direction. When the detector signal move, a speed can be calculated.
Line array: TSL202R
Number of pixels: 128
Readout serial mode 128 clocks + 1 for the stop
Readout clock: 441 ns
Readout time: 57.3 us
Integration time: 71.11 us
Piek voltage level laser signal: 1.72V netto
Used readout lens: Nikkor AF60/2.8D
Focal lenght 60mm.
Diafragma: F4 ( 1 stop closed)
Distance: to object: 550 mm
Used laserpointer: 1 mW red.
First problem:
Focal lenght lens is to short. Due to the distance and de diametre of the laser light, the captured diametre on the line array is only one pixel large, the second near pixel have a very smal signal. To solve this problem I need a longer focal lens.
General impression:
Signal is very sensive, the depht of the object is very precise to measure. Move the object a little shift the signal on the photoarray many pixels.
Laser signal is far above the ordinary light.
Signal is very sensieve to the object color, I need a higher laser power and the laserpoint may be bigger to have a bigger projection on the sensor.
Integration time determined the signal level, signal is lineair as time function to the saturation point. Now I have used 71 us, moving up to 128 us give higher signal to the saturated level but can be corrected via the lens opening. (higher F value).
While my wife Carrie and I were experimenting with light painting in my tent at Khao Yai National Park in Thailand, I accidentally shined my red laser pointer directly into my fisheye lens, which was open for 10 seconds. I later learned that this could cause permanent harm to my gear, so I'll never do it again...but for one oblivious night, it made for some truly disorienting, hallucinatory, unreal, fantastic photos.
Here I have used a Schneider Linhof 105/3.5 as detector lens. The lens is a recup from an old shutter. I have maked a new adaptor and put a Nikon F-mount on the other side so I can use him on my standard lens interface. See:
www.flickr.com/photos/fotoopa_hs/7703402018/
Now 2 green 10 mW laserpointers are used instead of the red 1 mW pointer. The difference is clearly, there are 6 pixels illuminated with this lens and 3 pixels have the max sensor value.
The integration time here is 71.3 us. If need I can use a shorter time as long as the ambient light is not to high, there is no problem. The green laser gives much more output despite he is not optimal in the pass band from the TSL202R line array sensor.
When the object is out focus there are 2 peak levels. More out focus equal more shift distance. Full in focus gives only one peak shape of 5 to 6 pixels. Here most pixels are saturated levels but when the signals are lower due to black reflection objects the shape remains the same as well as the position.
If the object move direction focus point the shapes move towards each other and finally have to coincide into one shape.
Fooling around with pointing a laserpointer sideways into the lens of my phone camera. Interesting how the light is scattered into what looks like particles. Have I actually photographed fotons here? Or is the laser simply pulsating very quickly?
A public stargazing session on a moonlit night at the Rothney Astrophysical Observatory, near Calgary, Alberta, Nov 21, 2015. Here, Robyn points out the star Vega with a laser pointer, while other look through telescopes supplied by members of the Calgary Centre of the Royal Astronomical Society of Canada.
First test signal from the line array readout. For optimal view , check the full size file!
Line array: TSL202R
Number of pixels: 128
Readout serial mode 128 clocks + 1 for the stop
Readout clock: 441 ns
Readout time: 57.3 us
Integration time: 71.11 us
Piek voltage level laser signal: 1.72V netto
Used readout lens: Nikkor AF60/2.8D
Focal lenght 60mm.
Diafragma: F4 ( 1 stop closed)
Distance: to object: 550 mm
Used laserpointer: 1 mW red.
First problem:
Focal lenght lens is to short. Due to the distance and de diametre of the laser light, the captured diametre on the line array is only one pixel large, the second near pixel have a very smal signal. To solve this problem I need a longer focal lens.
General impression:
Signal is very sensive, the depht of the object is very precise to measure. Move the object a little shift the signal on the photoarray many pixels.
Laser signal is far above the ordinary light.
Signal is very sensieve to the object color, I need a higher laser power and the laserpoint may be bigger to have a bigger projection on the sensor.
Integration time determined the signal level, signal is lineair as time function to the saturation point. Now I have used 71 us, moving up to 128 us give higher signal to the saturated level but can be corrected via the lens opening. (higher F value).
Day 365: The End [of the beginning]. I light painted myself with a laser pointer (kids, don't do this at home).
I had so many shot ideas today, but nothing planned before hand :) The one shot I wanted of me running through a ribbon on a track didn't happen due to timing, but might try that one again another day. The other was me crushed by a pile of my eBay cameras (just counted, have 33 film cameras to sell) with my wife standing over me saying "I always new those cameras would be the end of him."
There are still several shots I didn't get that I wanted to, so they will probably show up on an as time permits basis.
My next project will be a bit different and I will probably upload the first shot September 6th. What I am doing is doing 52 week planned shots. My weakness is I tend not to plan any of my shots (only did a couple during my 365 days), so this will force me to spend some time planning shots (and give me time to do so). I have a theme in mind, but I will have to see how well it will go.
These shots may or may not have me in them. I will be glad to take photos other than self portraits, but now that I have been doing it for a year it is ingrained in my head ;)
I want to thank Keitha and Jens for starting me on this project. I would have never had the motivation to do the project without them. Seeing their shots every day helped keep me inspired, and encouraged me to set my own standards higher than I otherwise would. I am shocked I actually finished a year long project. :)
Eric
Just a shot of my stainless steel coffee cup in the near dark as I wait for everyone else to wake up.
I'm warming my coffee with a laser pointer (CSI™, no less) we got at the Nutcracker Market yesterday.
Contrary to widespread belief, I did not get this cup in a Turkish Prison. I got it at Camp Strake, a boyscout camp when I took my son to Cub World ages ago. I drink coffee and remember the innocence of my son's youth. Also? The metal cup cools quickly which allows me to drink more coffee faster.
rotes Licht mit Laserpointer, das andere mit LED-Lampe erzeugt
many thanks friends, i am pleased with your visit and your comments
SCORE ME! , PLEASE EXPLAIN YOUR SCORES!
Srobist info: One snooted and green-gelled LP160 to camera left turned over vertically and one snooted and green-gelled 285HV to camera right pointed at wall.
This was filmed on 1/31/15 a few days after Katie came home. She was about 4 1/2 months old and getting a good workout burning off kitty cat energy.
temperance weaponfactory SAR-18
The specialist assault rifle system
top: basic model
middel: carbine model + laserpointer
lower: the fully intergral barrel sillencer
for battle tech rpg
#352 of 365 Daily Drawings
Inspiration: My son + our cat + laser pointer
Result: Mouse snipers
Materials: Pentel 0.3 HB, Sakura Micron 005 & Faber-Castell Pitt artist pen Red ~ 219, in a Stillman & Birn Epsilon series sketchbook
Location: home
Note: The red dot of a laser pointer is to a cat, what spotting a squirrel is to a dog. Soon the mice will figure out .....it doesn't just distract cats, it embarrasses them. Feline pride goes OFF. THE. RAILS!.
A bit late for the Macro Mondays light painting theme 6 days ago, but still a fun thing to try. I did this hand-held on purpose to make it a bit less clinical (although yes I was too lazy to get my rubbish tripod from the garage).
I'm sure a physicist can explain the grainy pattern left by the laser...?
Valéas received a present from me. It's a laser-pointer! Why? Because he doesn't understand the use of a target-stick which is used to point to the things you want the service dog to pick up. He picks up the stick instead of the thing I'm pointing at. A friend suggested a laser-pointer...
Closeup of the laserpointer and the photodiode as detector. The laserpointer is digital pulsed at short intervals. This is more reliable than continu DC signals. 2 laserpointers are used as croslasers. The central point of the 2 laserbeams is the focuspoint where the camera must be manual set. Also the flashes are pointed to this point. the 2 lasers have a distance of 360mm. The camera can be adjusted for a macro ratio from 1:1 tot 1:4 The macro range depends of the insect type. Most insects like fies or bees have a frame of 60mm.
How to take insects in flight see:
This is Catkin's favorite pose. She will stretch out on her back, staring at you, daring you to pet her belly... and if you do, she turns into a blender. A very deceptive kitty, indeed.
A few weeks ago, Stephanie and I bought Catkin a cat tree, which she loves immensely. We're trying to train her to wear a harness, as we'd like to take her outside on a leash from time to time, at least to get some fresh air and see the birds. We've also taught her the command for when to start (and stop) playing with the laserpointer.
Catkin is the middle child of the trio of kittens, her brother and sister being Johan and Val. She's getting pretty big -- she's at 10 pounds now. We recently found out that it's very likely she's part Maine Coon, which really should come as no surprise. She fits the bill pretty well, in terms of mannerisms and appearance -- and Johan is getting to be HUGE (will he ever stop growing?)
Anyway, Catkin. She hates closed doors (especially the bathroom), doesn't know how to cover her poop in the litterbox (though she spends 15 minutes scratching at it), and loves to lay upside-down, tempting you with that soft, fuzzy belly.
Auto-processed animated GIF of Tigger chasing a laser pointer dot on the floor. This was her favorite toy and a wonderful way for her to get some exercise.
To view animation, click on View all sizes and select Original size.
SAGE-S (Science Accelerating Girls' Engagement in STEM) is a one week long on-campus residential summer camp for public high school students (age 14-17). It is hosted by scientists and engineers who will share what everyday life is like in the STEM profession. (photo Jacqueline Orrell/SLAC)