Minhua Zhao, Xunda Jiang, Ruihuan Fang, Yuxiang Qiu, Zhu Ma, Chengyin Han, Bo Lu, and Chaohong Lee Appl. Opt. 60(17) 5203-5207 (2021)

by MH Griessmann · 2023 · Cited by 2 — The beam or mode quality M2, also known as the beam propagation factor, is defined in terms of the beam waist w0 and angular width Δθ. The ...

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Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the authors upon reasonable request.

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Telecentric lensworking distance

We present a high-performance laser frequency stabilization method using modulation transfer spectroscopy (MTS) on the rubidium 87D2 transition line. A substantial improvement of the laser frequency stability was achieved by searching for the optimal diameter and intensity settings of the probe and pump beam. The frequency instability measured from the beat frequency of two locked external cavity diode lasers (ECDLs) reached a short-term stability of $4.5\times 10^{-14}/\sqrt {\tau }$ and did not exceed 2 × 10−12 until 105 s, which is the best performance reported thus far with a D2 transition. The long-term stability is limited by the offset fluctuations of the baseline induced by the residual amplitude modulation (RAM), which can be further improved by reducing the current temperature variation of about 0.2 K by means of temperature stabilization or through a further reduction of the RAM.

We present a high-performance laser frequency stabilization method using modulation transfer spectroscopy (MTS) on the rubidium 87D2 transition line. A substantial improvement of the laser frequency stability was achieved by searching for the optimal diameter and intensity settings of the probe and pump beam. The frequency instability measured from the beat frequency of two locked external cavity diode lasers (ECDLs) reached a short-term stability of $4.5\times 10^{-14}/\sqrt {\tau }$ and did not exceed 2 × 10−12 until 105 s, which is the best performance reported thus far with a D2 transition. The long-term stability is limited by the offset fluctuations of the baseline induced by the residual amplitude modulation (RAM), which can be further improved by reducing the current temperature variation of about 0.2 K by means of temperature stabilization or through a further reduction of the RAM.

High resolution microscope slide for calibration and analysis.

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Chloe So, Nicholas L. R. Spong, Charles Möhl, Yuechun Jiao, Teodora Ilieva, and Charles S. Adams Opt. Lett. 44(21) 5374-5377 (2019)

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As a first step you need to determine the 'register' - that is; how much distance there is between the end of the focussing tube and the image-plane at infinity focus. If it's shorter than about 40mm, then it won't be easy to adapt the lens to anything modern.

the lens does come with a focus ring, the original owner was a cinematographer in hollywood. not sure what kind of camera was this being used for though? any idea?

You would have to have an adapter made, and if your lens doesn't have the focusing mount, your adapter would have to incorporate one, or you could have the adapter made to sit on the front of a bellows. Grimes would be delighted to make it for you, I'm sure, but it won't be cheap.

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Feb 20, 2009 — I have worked with fibers in sights since it came out. The best way to cut or trim them is with a good sharp pair of either finger nail or toe ...

Polarization of light - The process which causes light waves to vibrate in a single plane is called polarization of light · Q1. What is polarization of light?

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Aug 12, 2022 — We review the optometrist-recommended Clear View Eyeglass Lens Cleaner, which gives lenses a crystal-clear appearance. The anti-static and ...

Sanglok Lee,1,2 Geol Moon,2 Sang Eon Park,1 Hyun-Gue Hong,1 Jae Hoon Lee,1 Sangwon Seo,1 Taeg Yong Kwon,1 and Sang-Bum Lee1,*

The Telecentric is a telephoto; you need to mount it about half the focal length from your film/sensor. It's a simple screw mount in an inch size. The lens was available in a focusing mount, but mine, and the others I've seen for sale, have been for bellows cameras so don't have focusing.

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I'm not sure what you're expecting from this old tele lens. If you're after a 'vintage' look, then it'll probably be too sharp. And if you're after great image-quality, then it'll disappoint. It's just a mediocre 225mm telephoto, with a slow aperture. Almost any old tele-zoom from the 1980s will give a similar image quality.

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I have an 11-inch Telecentric for my Ensign Reflex. That's a quarter-plate camera (3.25 x 4.25 inch film); so what strikes me most is that you will only be using the very centre of the lens' image circle. Almost any lens is ok in the middle.

A pinhole camera boils photography down to its simplest components: light and composition, a huge contrast to today's digital photography. As a former ...

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In short, a tube lens has been designed with multiple elements to reduce aberration and make a high quality image. A Plano-convex is probably ...

The Telecentric is on pages 20 and 21. From the tables there. it looks like your lens should have a 1½ inch mount, and mine should be a 1¾ inch (I thought it was 2 inch,but Ross would know better than me!)

Anthony Gusching, Jacques Millo, Ivan Ryger, Remy Vicarini, Moustafa Abdel Hafiz, Nicolas Passilly, and Rodolphe Boudot Opt. Lett. 48(6) 1526-1529 (2023)

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You're lucky to have the focussing tube, but it'll need an additional custom adapter to fit any 35mm still-camera body. Or you could get a machinist to fit it with a 42 X 0.75mm T-mount thread.