DarkSucker

5 ms·

1.
by DarkSucker 9mo ago
The paper describes a split Alvarez (Lohmann) lens [1,2] with a phase modulator between them. I didn't do the math, but it looks like the phase modulator is optically equivalent to a mechanical shift of the Alvarez lenses over regions
2.
by DarkSucker 1y ago
Each pixel of such a scanner would need to somehow scan the spectral content. For example, imagine an array of fibers each transporting light from image plane pixel coupled to a spectrometer (bulky, expensive). Slit (a.k.a. push broom) sca
3.
by DarkSucker 1y ago
Sounds great, but I often find myself wondering "where's the catch?". There's not enough info in the abstract judge for myself whether the idea has legs. I'm sure it'll get more press if there's something
4.
by DarkSucker 1y ago
As I read the article. The tsunami wave (water) displaces air at the surface and creates a sound wave, and gravity waves, that travels to the upper atmosphere. These waves then interact with electrons in the upper atmosphere.
5.
by DarkSucker 1y ago
Thanks. I wasn't thinking of enums. To the extent one designs a trait to use an enum type (or the enum to satisfy the trait), one wins. But it seems impossible to avoid code to handle all future {type, op} combinations. The nice thing
6.
by DarkSucker 1y ago
The article's `expression problem matrix` section states that the goal is make it `easy to add ops` and `easy to add types`. My learning of Rust so far indicates Rust satisfies both: traits satisfies the `ops` problem for all traits yo
7.
by DarkSucker 1y ago
I think the alternative is shown in figure 2. SiN (silicon nitride) is different from optical fiber. Both versions shown in figure 2 lack detail, especially in the small boxes labeled GC, Mirror, and PD. Depending on the details, one might
8.
by DarkSucker 2y ago
Can anyone speak to the image processing used? In particular, how is depth inferred from a single 2D image? It seems to me one would need both depth and angle over the field of view to back out the lens focal length. The EXIF format doesn&#
9.
by DarkSucker 2y ago
That link made my day! Thank you. From what I read, their builds perform better than the originals, and they even make landscape versions. Woo hoo! RPN rules in my book. I picked up an HP 32 before they were gone forever, but I've been
10.
by DarkSucker 2y ago
Thanks! I'm sick and couldn't bring myself to do the wavelength calculation. Your comment helped my thoughts. I think people working on microwave equipment (frequency counters, ...) work in Hz.That's probably why they used th
11.
by DarkSucker 2y ago
Neither the article nor official link gave much optical design detail. Here's my guess. A (substantially) radially symmetric system comprising a wide-angle positive-short-focal-length first lens followed closely by a negative-short-foc
12.
by DarkSucker 2y ago
The new design design uses on axis mirrors to image the photomask onto the wafer, and on axis mirror systems are far easier to design and fabricate compared to zig zag (off axis) systems. I've never designed an EUV system, and I guess
13.
by DarkSucker 2y ago
It seems to me this data could be used to correlate a species/genus to a location if one knows where the samples came from. If one also knows the date of the geological strata the samples came from, then one also has a date correlation
14.
by DarkSucker 2y ago
Can someone provide/link-to a principle of operation? I looked at references ( https://www.dragonflytelescope.org/publications.html ) but they point to publications that look to be behind pay walls. In particular, I don&
15.
by DarkSucker 3y ago
It's a consequence of the relationship between absorption and index of refraction in glasses, which follow the Karmers-Kronig relationship [0]. As the wavelength approaches atomic resonance, the index increases or decreases depending
16.
by DarkSucker 3y ago
I wasn't aware that Canon used flourite elements. You learn something new every day. Nice. Their telephoto lenses also use holographic elements, and I attended a talk (1990 ish) where one of their lens designers spoke about a clever sc
17.
by DarkSucker 3y ago
Industry, please give us good search tools like those for researching articles: ("fog" near "coastline") AND ("lighthouse"). Or that offer regular expressions so I can search with precision. I got used to good
18.
by DarkSucker 3y ago
> Notebooks are still a great way to preserve the little details of "what the hell was I thinking?" Here here. WWIT (what was I thinking) is so valuable. I'm spending much more time now writing notes that provide context i
19.
by DarkSucker 3y ago
While neither animated nor as large as animatedknots, the Notable Knot Index https://notableknotindex.webs.com/ contains a short list of knots along with insightful comments on their use. Some, like the Slipped Buntline Hit
20.
by DarkSucker 3y ago
I did my own experiment on starting to read the article, and, as the author describes, I got the ball color, but not the persons hair color. On thinking about my experience, I likened my mental image to my normal visual image with a fixed g
21.
by DarkSucker 4y ago
BRIAR's how it works page depicts Wi-Fi and Tor also, so range isn't necessarily an issue.
22.
by DarkSucker 4y ago
Not being familiar with cosine distance, I found an NIST link: https://www.itl.nist.gov/div898/software/dataplot/refman2/au... . It seems like the main difference between convolution and cosine distance
23.
by DarkSucker 4y ago
> I'm not the type to get bitchy with customer service reps. I've managed teams that do that job, and I know how scripted their support has to be. "has to be" burns. It could be different. Why is a script essential? T
24.
Why do cats’ eyes glow in the dark?(theconversation.com)
1 points by DarkSucker 4y ago|1 comments
25.
by DarkSucker 4y ago
Nice. Almost what I want: simplicity, images (for plots), and no adds or tracking. However, I want to author pages on optics, and I want to use MathJax ( https://www.mathjax.org/ ) for equations. Please let me know how I migh