# Optic Definition and 27 Discussions

OpTic Gaming is an American professional esports and entertainment organization headquartered in Frisco, Texas. The organization currently has a franchised Call of Duty team in the Call of Duty League (CDL) branded as "OpTic Chicago" in partnership with NRG Esports. It previously competed in Counter-Strike: Global Offensive, Halo 5: Guardians, Gears of War 4, PlayerUnknown's Battlegrounds, Fortnite Battle Royale, DOTA 2, and League of Legends. The organization is currently owned by Hector "H3CZ" Rodriguez.

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Consider the infrared led TSAL7600 which has the following properties: $$\Phi = 35 mW$$ $$I_e = 25 mW/sr$$ The half angle is ## 30^\circ ## and: $$I_r(\theta) = cos^{4.818}(\theta)$$ is a good approximation for the relative radiant intensity. However, finding the actual radiant...
2. ### I Why does a spyglass or binoculars zoom in?

Why does a spyglass or binoculars zoom in? How does it work? I know a little about optics. But here's what interests me: how does a beam of light entering the binocular lens bring the object closer? This beam of light has certain information inside, and this information is "decoded" by...
3. ### I Difference between Working distance and object distance

So I have a problem understanding the difference between working distance and the object distance of a lens. For me it is also unclear what the difference between image distance and back focal length. If I want to enlarge the image by 6. How can I calculate the focal length, object distance...
4. ### Finding the angle at the apex of a rhomb with incoming linear wave

Hi, Since I'm dealing with a rhombus, the angle at the bottom(A) and top(A) are the same. Thus, I only have to find the angle at the bottom since the incoming beam is already perpendicular to the side of the rhombus. Since the incoming beam is perpendicular to the side ##\theta_I = \theta_T =...
5. ### I What does "upright" mean in geometric optics?

if someone want to explain to me what is an upright image ? , and what are the other adjectives to define an image in geometric optics and their meaning , Thanks .
6. ### B Is there a material that allows visible light and UV light to pass through?

Is there a material that allows visible light and uv light to pass through? Edit: A physical material
7. ### I Shorten the lens distance while having same focal length?

Hello Everybody, I'm David from Spain, and happy to be here. We have a LED that needs a FL50mm collimator which is focused to infinite, because we want parallel rays. So the lens is at a distance 50mm (approx) from the led. However, 50mm is too much distance for our design, so the question is...
8. ### In optics what do Tp and Ts stand for and what are they?

In optics what do Tp and Ts stand for and what are they? I believe Tp is the highest amount of light transmitted and Ts is the Lowest amount of light transmitted though a material. but I cannot find that much information on these terms.
9. ### The sources of error in a diffraction grating experiment

In a diffraction grating experiment, what can be the sources of error and also what effect do these sources have on the unknown quantity (wavelength) in the experiment?
10. ### Modes of laser propagation in cylindrical optics

I saw the solution of the light propagates in cylinder.. so in every solution there is the first order Gaussain function (the slandered one) times another function which gives I think the separation, both of them gives the intensity separation.. So what does that mean?! is it as I draw on the...
11. ### Evanescent and Gradient force on an optical waveguide

Let's say that on the surface of the cladding we have evanescent field due to the total internal reflection between the core and the cladding. The refractive indices of the the core is 1.45 and the refractive index of the cladding is 1.4, and I want to use the gradient force of the evanescent...
12. ### A Silicon Nitride Waveguide

Does the Silicon Nitride Waveguide (Si3N4) has a cladding ?! I read an article that they use the evanescent field of silicon-nitride waveguide.. If the answer yes it doesn't has a cladding then can I say that the evanescent field length in the surrounding medium is the mode field portion in that...
13. ### Second reflection angle of incidences in 3D

Given Theta1(angle of incidence) and alpha1(azimuth angle). how do we obtain the second reflection angle theta3 and alpha3? Assuming the surface to be a mirror reflection(theta1 = theta2). Need an equation when varied the incident angles we would obtain the second reflection angles or a method...
14. ### Elliptically polarized light & partially-polarized light

How to distinguish elliptical polarized light from partially-polarized light?
15. ### B Phase shift in Mach-Zehnder interferometer

I'm confused by the phase shifts in a Mach-Zehnder interferometer because I keep finding two different explanations. One explanation (for example, given on Wikipedia, but also elsewhere) states that on each reflection, the phase shift is 180 degrees, but only, if light is reflected from the...
16. ### B Trivial questions regarding parallax and measurement of distances.

While trying to understand parallax and its use in measuring distances here, I had a few questions. (1) Parallax is defined as the apparent movement of an object with reference to another object in the background when one views it from different angles. As in the movement of a finger relative...
17. ### B Can Prism form image?

Do Prism form image? If they do form image, then what is the nature of the image formed?
18. ### B Can we get a real image of virtual objects?

Is it possible to get a real image of virtual objects, If so please explain with examples and some real life situations? Look at my assertion "rays will not pass through virtual objects so how it can form real image", is this possible, please help.
19. ### Optical Making a vein viewer with LED lights

I'm trying to optimize my vein viewer with LED lights but I'm not sure which factors affect the penetration of the light through the skin. (I'm following this guide https://www.instructables.com/id/How-to-make-an-affordable-Vein-Finder-for-use-d/) I can say those factors are the angle of the...
20. ### I Finding the Fresnel coefficients from interface conditions

I'm studying for an exam (so this is existential) and I never really got how to write the limit conditions for an interface. In my problem, there is an incident electric field, and there are two cases: 1) the field is polasised perpendicularly to the incidence plane (TE) 2) polarised in the...
21. ### The Difference Between Diffraction And Interference Patterns

I've recently come across this problem: Answer true or false. If light shines through 2 slits, will the diffraction pattern always be within the interference pattern. I don't understand this question, however. How can the interference and diffraction pattern be separated in this situation...
22. ### Can a light beam stop in air?

is it possible, i mean can we hold it at a certain distance we want ?
23. ### Geometic distortions applied to a Fresnel lens and a photo frame to achieve uniform focus?

Well this thread title sucks, sorry. << Mentor Note: Title Edited>> :smile: I have a plano convex lens (actually equivalent stack of two fresnels each with focal length 120mm, groove pitch: 0.3mm). If I put a photo behind it at a 45mm distance and view through the lens from a 12mm distane, I...
24. ### Stargazing Radio telescope aberration

I was studyng my exam of astrophysics laboratory, while treathing the optical aberration I've wondered: does radio telescope have aberration? Is a paraboloid antenna in a single dish affected by coma? and the radio telescope made by arrays of resonant structures? Maybe those are silly...
25. ### Imaging optics and lowest possible angle video projection?

I have a very very unusual project requirement where I need a pocket video projection with the lowest possible projection angle or "longest possible throw-ratio". It's a pocket DLP projector so goal is to have the beam remain ,as much as possible, almost the same size as the DLP matrix, for a...
26. ### Resolving bodies at large distances

Homework Statement If a 6.5m diameter telescope operates at wavelengths between 600nm to 2800nm, and for stellar densities similar to the Solar neighbourhood, what is the range of distances this telescope can resolve individual stars? Homework Equations The Attempt at a Solution My attempts...
27. ### When I analyze elliptical polarization using a linear polarizer....

hello everyone,I want to construct the elliptical polarization in Jones's Matrix form . So, I use the linear polarizer to analyze this polarization. where the Intensity ,which obtain by using the linear polarizer,come from? by integrating overall angle or the other way ?