Circular Polarization of the Astrophysical Gravitational ... - circular polarization

 2024-07-26 14:12:38

So if you insert the laser in the focus tube and spin it, how vast the gap should be? Do you mind filming a really short video showing that when you're free?

HUE cameras work with a wide range of video conferencing and picture editing software. Any software that is designed to work with a USB camera should work using HUE as its video input source, including Zoom, Google Meet, MS Teams, Skype, QuickTime, Seesaw, Loom, FaceTime, Discord, Twitch, Slack, OBS, Webex, Chime and many more. You can find guides for using popular video conferencing apps with your HUE camera in our Tutorials section.

You just need to have the laser spin evenly around the polo mark so irrelevant how far the laser is out of collimation .

This may seem long and drawn out but you always move towards a better setting and will get on point faster. Doing large adjustments is actually slower in the end.

*Plug & Play means that the user does not have to configure the camera for it to work. The operating system will automatically detect it as a USB device. The user simply chooses which application they want to use (i.e. Zoom, QuickTime or OBS Studio) and selects the HUE camera from the available devices in its settings. The HUE HD camera does not come with any additional software to install.

Right, Mike! 👍🤜🤛🔭 Your description of how to proceed is excellent! I just wanted to give some numbers and the general formula so our colleagues would understand why it's essential to put a reasonable distance between the laser and the wall, I'd like to use 10 to 20 meters. I forgot to mention narrowing the laser beam even more! 1st - Regulate the laser lens to have the point focused at the calibration distance. 2nd - Open the collimator and under the 45º diagonal, just in front of the laser exit (internal) glue an aluminum foil, press your finger on it so the central hole appears, and with a needle, punch a small hole at its center. This will reduce considerably the laser dot diameter, which is not a dot because the solid-state laser beam is generated at a rectilinear junction. The laser point should have an internal diaphragm, which has not. So we make one at the exit. This mod really improves the laser collimator performance making the dot smaller! Regards and clear skies for us all!🙏🔭 Andy

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The camera’s built-in microphone is perfect for recording a music lesson, podcast, or gaming session as well as for distance learning, online classes, streaming or video calls with family and friends. The microphone features noise reduction/cancellation, a sampling rate of 8000/16000Hz and accuracy of <5 PPM.

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The reason I went for the HUE HD cam is that it has a gooseneck and a focus ring, and it’s small. Perfect for working with time constraints while making visually interesting shots and moves.

I use the HUE camera when I’m threading up sewing machines. It’s always tricky demonstrating small things, my colleague and I both use the camera in our art lessons now. I can plug it directly into the Promethean monitor too, so it’s perfect for sewing machine, batik demonstrations.

It needs to be at least that I feel. The further the laser dot is projected, the easier it is to see where it varies as you rotate the laser around it's axis and the more accurate the collimation is, when you achieve it. I try and get around 30 feet and when adjusting, try and get the laser dot to stay within a 10mm circle, or better if possible.

Stream or record videos using your computer’s native camera apps or Zoom, Google Meet, Microsoft Teams, Skype, QuickTime, Seesaw, Loom, FaceTime, Discord, Twitch, Slack, OBS, Webex, Chime and many more.

So if you insert the laser in the focus tube and spin it, how vast the gap should be? Do you mind filming a really short video showing that when you're free?

This may seem long and drawn out but you always move towards a better setting and will get on point faster. Doing large adjustments is actually slower in the end.

Just one more thing, I know the long debate about laser vs cheshire, please spare replies such as "get a cheshire" or "you should've bought a cheshire" and so on, maybe its true, maybe I learned it the hard way, but its still not helping my situation, so thats just it, thanks a lot

A bigger problem is that after about 30 minutes of trying to collimate the laser, the screws worn out and it was just unusable, so I just used regular screws instead, it should work in theory, after all its only laser with screws that push it to whatever direction you need, the weird this is, when 1 specific screw is not screwed at all, the laser circle(when you spin the laser to check if its collimated) is not so big, but after screwing the screw(is that how you supposed to write it? o: the gap is widening, eventually, no matter really what I try, I just can't seem to manage to collimate it. Maybe I'm doing something wrong possibly? Hopefully someone will be able to help me and give me some advices.

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Optimal image capture with the camera in its base is an A5 page (half US letter size). The camera can be placed on a higher surface if a larger capture area is required. If you need to capture a larger area, we recommend choosing the HUE HD Pro camera instead.

I place the collimator in a v-block (anything that supports it in a fixed orientation is fine) aimed at a wall about 16 feet away.

Well the problem is no matter what I try its just not really working, the screws are not going to the direction they should.

In a recent OFSTED inspection an inspector commented on the use of the visualiser (HUE HD) in a Food Studies lesson and the positive impact it had.

The all-in-one HUE HD camera contains everything you need to take photos and make recordings without requiring an external microphone, separate tripod or stand; all that you have to do is connect it to your computer.

Clearly one of the BEST Educational investments made during a pandemic is my @HUEHD camera! Bought June 2020. It’s helped me even during remote learning or inclement weather days @WROdellElem pic.twitter.com/49KVS3wiuQ

The laser unit is held in the machined housing with a rubber "O" ring type thing at one end and three grub screws that go through the housing press against the laser unit at the other end of it. On some models you need to remove a label to reveal the grub screws I believe. You might need to loosen one grub screw a little to allow adjustment to another. You need to remove the screw on battery cover section and spring from the end of the collimator to allow the last unit inside to be free to move as well.

This affordable teaching resource can be used across the curriculum, offering exceptional value for money. It is very popular with teachers, who use it in innovative ways to support the learning and development of their students both in class and remotely.

Thanks, one important question, the laser doesn't need to be "10 feet away" to do it right? I'm not failing to do it because of the distance I'm trying I assume?..

The HUE HD camera makes it very easy to quickly take snapshots. Share ideas, sketches and notes in real-time to support discussions and make more efficient decisions.

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Rotate the collimator and the dot describes a circle. Get the dot at the bottom of the circle. If a screw is more or less at the top, tighten by half a turn. If a pair of screws are either side of the top, turn one of them to the top and tighten by half a turn.

Newer models now come with a hard carry case to help you stay organized and protect your investment. Designed exclusively for the HUE HD camera, this zipper case is a must-have accessory for educators, presenters, and professionals who rely on their document camera for demonstrations, presentations, and more.

Je vous remercie vivement pour votre réponse rapide, très détaillée et très précise. Grâce à vos explications j’ai réussi à utiliser la caméra, c’est parfait ! Merci beaucoup.

Pick which video chat network you wish to join, download the software from their website and follow their setup instructions. Make sure you set the USB camera as your camera and microphone in the new app’s settings, then you’re ready to chat!

Share students’ work for peer assessment, live marking, ‘what a good one looks like’ (WAGOLL) or demonstrate a technique or science experiment for the whole class. Record lessons, presentations and instructional videos. Create a content library for flipped learning, catch-up, revision and continual professional development (CPD).

Many third party camera apps have options to flip and mirror the live video, as described in our detailed guide to flipping and mirroring the camera feed.

I don't have the facility to film it I'm afraid. You turn the laser collimator slowly around 360 degrees, stopping every 90 degrees and marking the position of the laser dot on a piece of paper taped up around 30 feet from the laser unit. That shows you how far out the unit currently is. Then you pick a grub screw, hold the laser collimator in place in the V block and make an adjustment to the screw noting which way the laser dot moves - hopefully towards a spot at or near the centre of your 4 90 degree marks. The repeat the rotation, mark accordingly and adjust again as necessary. It is a bit trial and error I'm afraid.

The second one a friend well more advanced than me collimated it for me but he even said done the best he could and it is only slightly out, I know you won't like this but I then check with a Cheshire/ sight tube.

Fortunately I have a lathe which makes collimating your collimator easy. Mount the collimator in the chuck, tape a piece of paper on the far wall and slowly rotate the chuck. Word of warning though: many modern 3 jaw chucks do not run true, so you may have to use a 4 jaw & dial it in.

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i get this topic here which will be very helpfull to me.my laser collimator is also not steady its red spot in constent position.i hope this advice will work for me.

Now rotate the collimator again but aim to get the dot at the top of the circle, and choose a screw the same way and loosen it.

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Its integrated microphone, together with manual focusing ring, will allow you to capture, stream and share high-quality video, audio and images with friends, family, colleagues, customers or students. The unique, flexible design is multifunctional, portable and built to last.

Edit: Even with my laser collimated I mostly use a sight tube to collimate the secondary mirror, with the laser just to check/tweak. To collimate the primary mirror I use the barlowed laser method (just put a barlow between the focuser and laser). This turns the laser into a torch which illuminates the central part of the mirror and the centre spot. You then collimate the primary by centring the shadow of the primary spot on the collimator face. This method reduces the effects of inaccuracies in the collimation of your laser and secondary mirror.

We have been using the HUE cameras at our school for a few years now. We have a set which we use in conjunction with the laptops. They are very easy for our year 2s to use and we have made some great animations with them. They are also very good to use as visualisers to project our children’s work onto the interactive whiteboards for a class discussion. Some items made from brightly coloured plastic don’t work but these cameras are working really well and a great, cheap resource for any classroom.

I have used the HUE cameras in several schools in the UK as both visualisers and cameras to easily create images for animations. They are so easy to set up and to use.

With 360° rotation, the flexible USB camera can view difficult-to-capture angles, producing images and video which can be shared with a projector, interactive whiteboard or TV screen.

The Plug & Play camera can also be used without its base and cable, keeping your workspace clutter-free. Compact, light and portable, it is easy to carry between work and home. The solid, non-slip base has a small footprint and will fit neatly on your desk.

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A well-collimated laser collimator when rotated on itself, will generate a 10 mm circle on a wall when at a distance of 30 feet (9.144 meters). Adopting this criterion it's clear that the collimator has a deviation angle from the centerline (circle's center) equal to alfa, where alfa = 1.8 arc-minutes. So: A well-collimated collimator must have a deviation < 1.8 arc-minutes. Let's simplify and assume a maximum tolerance of 2 arc-minutes of deviation for any laser collimator. In that case, the deviation r [mm] at a distance L [mm] will be: r [mm] = L [mm] x tan ( 2 arc-minute) = L [mm] x tan (1/30) = L [mm] / 1719 r [mm] = L [mm] / 1719 Therefore, on a collimator with alfa < 2 arc-minutes at 30 ft (9144 mm) from a wall, we are considering it generates a circle with a diameter < 10.6 mm. A 10 or 11-mm circle is quite small so we need to increase the distance by at least 20 meters to have a circle of 23 mm, which has enough room for the laser dot and will let us draw the circle easily on paper and center it to make the proper corrections! Regards Andy

Use it for close-up work, especially where it is difficult or dangerous for everyone to watch at the same time (e.g. in a chemistry class). It can act as a basic microscope, display maths manipulatives or, for example, demonstrate how a calculator is being used.

If you can’t install extra software on your computer, Windows users can connect through the built-in Microsoft Camera app (requires Windows 8.1+). Users of macOS or Mac OS X 10.6 or later can use the built-in version of QuickTime for viewing the live video and making recordings.

Compatible with Windows, macOS, Linux and Chrome OS. The camera is a Plug & Play* device so there is no need to install drivers. Simply connect it to your computer’s USB port and select it in any application that recognises a USB camera, such as QuickTime or the built-in ‘Camera’ apps for Windows and Chrome OS.

You just need to have the laser spin evenly around the polo mark so irrelevant how far the laser is out of collimation .

My comment is about HUE customer service. Our school ordered approximately 16 HUE HD cameras for teachers to use in both ELA and Math last school year. This year we had an issue with one of the cameras that was not working. I contacted HUE and they are sending a replacement! It was quick; easy, and no hassle!

Whether you’re working remotely (WFH) or in the office, you can easily prepare a presentation, interview candidates, give demonstrations or conduct online consultations (e.g. teletherapy).

HUE cameras are Plug & Play and will work with any application that recognises a USB video device, such as built-in camera apps on an interactive display or the camera apps included with Windows, Chrome OS, macOS and other operating systems.

You can move it around freely and adjust the focus during a presentation without needing to change any settings on your computer.

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I place the collimator in a v-block (anything that supports it in a fixed orientation is fine) aimed at a wall about 16 feet away.

I like to use the HUE camera because it’s connected to my laptop. It helped me during distance learning because I can record my screen. It was very helpful. It’s available at a good price point.

This camera exceeds expectations. It’s plug and play design makes is super easy to set up, and transport anywhere. It’s sleek design makes it easy to use in tight spaces which classrooms tend to be. I’ve used it to record videos for distance learning, but also used it as a document camera in my classroom.

Some of the China made budget lasers and cheshires are a bit naff imo and are just not made well enough to be totally accurate out of the box. I ended up buying a Baader and it was spot on. The reason Howie Glatter and Hotech kit is so expensive is because they manufacture high quality, precision made devices.

Hello, I purchased a laser colliator but unfortunately I'm facing a problem, I knew that I need to collimate the laser before I purchsed it, and I got something just for that at home, so I thought it wouldn't be a problem, but for a reason I don't seem to be able to collimate the laser, at first the laser was a bit off, so I tried playing with the screws, but it just didn't really worked, no matter when I did the laser was just not going to the direction I needed it to.

First Chapter Friday with the hue_hd! Our HUE HD camera is so versatile; we use it with everything! As a teacher, it is so easy to set up and easily able to be moved around the classroom. It can be used in ALL subject areas! We love using our HUE HD to introduce new books on Fridays & did I mention that it’s totally affordable too?

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I have used the camera for my son’s online classes it has really helped us in the session. The tutor recommended it to us and it has really made the sessions better to manage. I can switch anytime in between so that the tutor can see my son or the work he is producing. The quality is really good and very easy to operate. Overall, I’m very satisfied with it. 🙂

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Now rotate the collimator again but aim to get the dot at the top of the circle, and choose a screw the same way and loosen it.

Using the camera to enlarge small objects or text enables students with visual impairments or special needs (SEN) to fully participate in classes or online activities.

The circle should keep getting smaller. As you it gets really smell reduce the amount you turn to a quarter turn or less.

Note: It can be plugged directly into an interactive flat panel display if the panel has its own built-in operating system.

Thanks, one important question, the laser doesn't need to be "10 feet away" to do it right? I'm not failing to do it because of the distance I'm trying I assume?..

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Absolutely. IMO this bit really isn't optional if you want to ensure good collimation. An unbarlowed laser can be useful for rough alignment of the secondary, but that's about it in my view. On its own, I'd rather use a basic collimation cap than a laser.

The camera’s agile gooseneck can be freely positioned for a multitude of uses. Angle it straight ahead to use it as a facecam, position it downwards for use as a document camera or move the neck in real-time while examining an object. Move the camera, not your laptop.

Another factor is securing the laser in your focuser. A single screw will knock the laser off centre. For this reason I prefer the Hotech with it’s expansion rings which keep the laser centered. My HoTech came perfectly collimated and when used it’s in perfect agreement with my Cheshire and cap.

The award-winning HUE HD USB document camera and visualiser is ideal for video conferencing, streaming, teaching in a classroom or remotely, animating or working from home.

So if you insert the laser in the focus tube and spin it, how vast the gap should be? Do you mind filming a really short video showing that when you're free?

We use the cameras with our Year 2 pupils. The most exciting part of HUE is the animation aspect. The children love seeing their images move. We have also used them in class as a visualiser.

Now bottom and tighten, followed by top and loosen. If at any point the screw feels tight, don't force it but do a top/loosen cycle twice instead. If it a screw feels loose, retighten it and do one or two bottom/tighten cycles

If you’re gaming, animating, vlogging or streaming you can set the camera up as a facecam, handcam or keyboard cam (e.g. when teaching piano). The microphone makes it easy to share audio from other gamers around your table, or to capture ambient sounds. The camera can be used in conjunction with your onboard camera where needed.

The manoeuvrability of the camera is invaluable when I am teaching using manipulatives. The children can see what I’m doing via my HUE HD and they copy me and I can watch what they’re doing, step by step via their HUE HDs. Also for bookwork – I can watch them work something out and get inside their heads to understand how their minds are working, which means I can help them every step of the way until they can find their own way.

Absolutely love using ‘HUE’, best classroom tool and even my class prefer them over iPad Reflector software. My classroom teaching and assessment would be incomplete without HUE.

The document camera is working very well! It has made things easier in the classroom as I do not have to scan everything before showing it to my kids! The cameras have amazing quality and the possibilities are limitless!

The optical lens has a focus range of 5cm ~ infinity. The manual focus can be used to magnify moving or handheld objects without the continuous automatic adjustments which occur with an autofocus lens.

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I agree with you, bosun21! A very important point you mention by the way! Indeed this is a problem with many drawtube's eyepiece holders...😢 Laser collimators and Cheshires will show this off-centering when we tighten the retention screw... A partial solution is to make the collimator body fit more tightly (a scotch tape around usually will do), being the recommendation not to tighten the screw when we achieve a tight fit using this method.

The circle should keep getting smaller. As you it gets really smell reduce the amount you turn to a quarter turn or less.

Not really unfortunately, I've already seen any video I could find about that, but with no use, the thing is its possible that my collimator is faulty, so idk really if its just me and its the collimator, or both...

I don't have the facility to film it I'm afraid. You turn the laser collimator slowly around 360 degrees, stopping every 90 degrees and marking the position of the laser dot on a piece of paper taped up around 30 feet from the laser unit. The V-block and laser unit must stay completely still in one place of course during this rotation. That shows you how far out the unit currently is. Then you pick a grub screw, hold the laser collimator in place in the V block (and the V-block exactly where it was as well) and make an adjustment to the screw noting which way the laser dot moves - hopefully towards a spot at or near the centre of your 4 90 degree marks. The repeat the rotation, mark accordingly and adjust again as necessary. It is a bit trial and error I'm afraid.

Spin the laser in the focuser so the red laser spins around the polo mark on the mirror then adjust secondary so laser spins evenly around polo mark , does it that make sense