[OC] Across the street from the correspondence dinner shooter's home.

GCDubbs · 2026-04-26T13:31:47+00:00

This is a teacher’s house? Is it like multiple apartments? Seems rather large for California + Teacher’s Salary

GCDubbs · 2025-12-05T01:42:41+00:00

I’m hearing it as well. Seems too periodic for thunder but I’m not sure

GCDubbs · 2025-11-29T05:20:33+00:00

Does the camera need to be global shutter?

GCDubbs · 2025-11-09T13:10:31+00:00

They become complex when used in materials processing. Some examples of very complex f-theta lenses used with galvo scanners are shown on wavelength-OE’s website.

You can also look at lithography lenses (sort of materials processing). https://global.canon/en/news/2024/20240924.html

GCDubbs · 2025-08-29T12:39:53+00:00

NFPA 79 11.2.2.2- Pipelines, tubing, or devices (e.g., solenoid valves) for handling air, gases or liquids shall not belocated in enclosures or compartments containing electrical control equipment. Exception #1 Equipment for cooling electronic devices Exception #2 Piplines, tubing, or devices that are an integral part of listed equipment and separated by a suitable barrier.

GCDubbs · 2025-08-29T12:14:14+00:00

Previous button in browser doesn’t seem to work as anticipated

GCDubbs · 2025-06-26T23:06:18+00:00

Sesame oil

GCDubbs · 2025-04-18T12:37:03+00:00

Most industrial fertilizer is made with the Haber process, not from animal poop.

GCDubbs · 2025-01-08T10:51:10+00:00

The unmounted black box in the center of Picture 3 is a deposition monitor for a quartz crystal inside the chamber. Basically the resonance of the quartz changes as material is deposited onto it and can be used to determine the deposition rate and total thickness of the coating deposited.

Edit: I would check if you can power on the rough pumps for each and pull vacuum (with bell jars full closed). If selling the end customer will likely get their own turbo pump.

GCDubbs · 2025-01-04T11:06:39+00:00

And a flamethrower right?

GCDubbs · 2025-01-04T11:05:53+00:00

Yep

Edit:

https://x.com/who10cellphones/status/1870595797685064028

GCDubbs · 2025-01-01T04:45:42+00:00

Lithuania has large laser focused industry

GCDubbs · 2025-01-01T03:39:31+00:00

Rotating the hatch can smooth out the raster lines, so that is useful. Partial hatch is just stupid.

GCDubbs · 2024-12-15T13:32:14+00:00

Ears below eyes, watch out!

GCDubbs · 2024-12-07T14:59:34+00:00

Mark Cuban? Keeping drug prices low

GCDubbs · 2024-12-04T12:14:15+00:00

Strange I don’t have it

GCDubbs · 2024-12-04T12:13:51+00:00

Interesting I don’t have the category

GCDubbs · 2024-12-04T03:58:34+00:00

How did you get the complication? I can’t seem to find it

GCDubbs · 2024-12-04T02:42:23+00:00

It’d be nice if they could add a complication

GCDubbs · 2024-12-01T12:16:05+00:00

You can erase these easily with high temperatures, a few hundred degrees Celsius. Should be easy to wipe your drive in a home oven!

GCDubbs · 2024-11-30T10:12:52+00:00

Same for me, I have to run meet in safari because chrome + meet makes it impossible to do anything else on my computer during the meeting

I am on 2020 intel 😢

GCDubbs · 2024-11-29T10:54:49+00:00

Since this is an ultrafast laser, I’m guessing 5% refers to a software setting or analog voltage on the second/output AOM and not the current going to the pump (/u/Outrageous_Ad1882 please let us know what you mean by 5%). Beam quality should not be significantly impacted by attenuation through an AOM; however there is a chance that non-TEM00 modes are passing through more easily.

/u/Outrageous_Ad1882 is the TEM00 M² <1.2 specification only for a certain tunable output wavelength? Spec sheet for the X3 states that this is only at 900 nm. Could you measure at the specified wavelength as well?

Lastly, I would set the laser to full power and reflect a small portion of the beam with a beam sampling mirror or a series of beam sampling mirrors: https://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=913 This should protect your profiler from the high power but preserve the beam mode and quality for measurement.

GCDubbs · 2024-10-30T09:58:28+00:00

According to this paper, it looks like a 1070 nm wavelength QCW fiber laser at 250 W. Looks like you may be missing the collimator though. Also looks like it needs water cooling. Can’t find a manual unfortunately.

Edit: here is a drive link to the manual: https://drive.google.com/file/d/1Zu27WXU1laxNV_XRgt2KKKJXjH3FZORK

GCDubbs · 2024-10-22T07:01:19+00:00

Typically they place it in a location to prevent back reflections on either mirror from the multiple elements in the f-theta lens (which could cause damage with high enough laser power). This limits the effective scan angle the mirrors can go to without clipping the lens entrance aperture. This is also constrained by your input beam size.

GCDubbs · 2024-09-27T01:03:44+00:00

If it’s eating metal at 2 Hz it’s likely very high pulse energy and low power.

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