Best, I need a thecnical contact to explane my castom problem. Please note that the magnification will change if an objective lens designed for a different tube lens EFL other than 200mm is used with the TL200-CLS2. The lens will need to be refocused when used at other wavelengths. We have our own tube lens and were wondering if the mount is the same? Rather than having to locate the exact position of this external plane, we use WD as an analogous measurement to focal length because it is measured from the housing of the optic itself. Hello, thank you for contacting Thorlabs. Hi, if i have a lens attached to the camera sensor, should I keep a 148mm from the end of the ITL200 to the front mount of the lens attached to the camera? Nominal bandwidth, working distance, and performance can be estimated using the Zemax black box files. Approximate intensity profile of your beam (e.g., Gaussian), Linear power density of your beam (total power divided by 1/e, Energy density of your beam (total energy divided by 1/e, Pulse repetition frequency (prf) of your laser, Effective Focal Lengths Used by Thorlabs, Nikon, Leica, Mitutoyo, Olympus, and Zeiss, Five AR Coatings Available, See Table Below. Most notably, there will be more spherical aberration as well as vignetting. It would be very useful if you could provide non-sequential files as well as the sequential ones or if there is some way to convert them that I am missing that would be even better. Reto. You can change this selection at any time, but products in your cart, saved lists, or quote may be removed if they are unavailable in the new shipping country/region. In an infinity-corrected optical system, a light beam emitted from a specimen passes through the objective lens which does not form an image and enters as an infinity parallel beam in the tube lens which forms an intermediate image. Please note that we have a buffer built in between the specified damage thresholds online and the tests which we have done, which accommodates variation between batches. Get training tips on using different illumination techniques to help with all your microscopy applications. Infinity-corrected microscope optical systems, which have overtaken the microscope market, are designed to enable the insertion of auxiliary optical devices, such as vertical illuminators, filter cubes, and intermediate tubes, into the optical pathway between the objective and eyepieces without introducing spherical aberration, requiring focus . Let us know what you're looking for by filling out the form below. Additionally, for highly transparent materials, there is little to no drop in the LIDT with increasing PRF. The tutorial initializes with the Object Height slider set to the largest available value. We would also like to use cookies which enable us to display adverts in a browser and in social media which we consider interesting for users; to do so, social media providers will also receive data collected via these cookies . We offer four tube lenses with non-standard focal lengths that can be used to change the magnification of an existing system. The M9332 microscope features large double-layer mechanical stage, two pairs of 10X and 15X super wide field eyepieces, and four high quality infinity-corrected plan objectives. Matthew J. Parry-Hill, John C. Long, and Michael W. Davidson - National High Magnetic Field Laboratory, 1800 East Paul Dirac Dr., The Florida State University, Tallahassee, Florida, 32310. - Olympus OMd-Em5II camera; I will reach out to you directly to discuss your application. Optical elements that produce magnification include objectives, camera tubes, and trinocular eyepieces, as shown in the drawing to the right. Greatings from Germany Unfortunately, this is highly dependent on factors such as absorption and thermal diffusivity, so there is no reliable method for determining when a high PRF laser will damage an optic due to thermal effects. The SM2 threads on top can also be used to integrate user-designedcamera tubes constructed from SM2-threaded lens tubes. Thank you for contacting Thorlabs. | As for the ITL200, we do not have exact values for many of the specs, but I will reach out to you directly about how to compare against a similar lens, like TTL200. While many optics can handle high power CW lasers, cemented (e.g., achromatic doublets) or highly absorptive (e.g., ND filters) optics tend to have lower CW damage thresholds. In this case, however, the tube lenses are not single element optics but actually contain multiple lenses, causing the principal plane of the lens system to lie outside of the physical optics themselves. Part #. At the moment zemax does not provide a method to convert a sequential block box model into a non-sequential mode. Response from Bweh at Thorlabs USA: The focal length is relative to a principal plane of the actual lens element which is inside the housing while the working distance is relative to the external housing edge. I also need the ITL200 front focal length, has Nikon provided this information? Hi, could you please share CodeV files in addition to the Zemax files ? I am especially interested about the TTL200-A and the TTL-200MP. Upon request, we can provide individual test information and a testing certificate. Wavetrains of light leaving the infinity-focused objective are collimated, allowing beamsplitters, polarizers, Wollaston prisms, etc., to be introduced into the space between the objective and tube lens. Opt. I would very much like to ensure that I'm getting correct results in my simulation. Hello Glenn, thank you for your feedback and bringing this to our attention! Note thecalculator is an Excel spreadsheet that uses macros. Note that Leica, Mitutoyo, Nikon, and Thorlabs use the same tube lens focal length; if combining elements from any of these manufacturers, no conversion is needed. A majority of modern research microscopes are equipped with infinity-corrected objectives that no longer project the intermediate image directly into the intermediate image plane. These infinity-corrected tube lenses are designed for use with infinity-corrected objectives from all major manufacturers, including the dry, oil immersion, and physiology microscope objectives sold by Thorlabs. These microscope systems have an image distance that is set to infinity. Light beams are directed and then converged towards a specimen of interest and at least one image is formed from the reflected light. I am wondering if it possible to get this optic either uncoated, or coated with your 'B' anti-reflection coating for 650-1050 nm? Thanks. Once refocused for a new center wavelength, the performance will be diffraction limited for some finite bandwidth around that wavelength. Using an M Plan APO 10X objective (#46-144), MT-1 tube lens (#54-774), and a 2/3 sensor camera, what is the maximum spacing between the tube lens and objective without vignetting? Response from Jeremy at Thorlabs: You can contact us at techsupport@thorlabs.com to discuss about your application. A majority of modern research microscopes are equipped with infinity-corrected objectives that no longer project the intermediate image directly into the intermediate image plane. Payment & Shipping It fits common size compound & biological . The tube length in infinity-corrected microscopes is referred to as the reference focal length and ranges between 160 and 200 millimeters, depending upon the manufacturer (see Table 1 ). It fits common size (DIN/JIS standard) compound / biological microscopes. If your maximum energy density is less than this adjusted LIDT maximum energy density, then the optic should be suitable for your application. Objectives can be attached to the Precise Eye UltraZoom and the MicroMate Imaging System to increase the system magnification and decrease working distance. Thank you for reaching out to us at ThorLabs! Strangely, this component is not listed in the table of adapters, therefore, I could not find it. For data presented here, a <1 mm beam size was used to measure the LIDT. We will contact you directly about the ITL200. Sitemap. For reference, a 22 mm field size is large enough to fill a4/3" format camera sensor. lens tube to connect to the WFA4111 Dovetail Adapter (available below). If the optic was tested at a wavelength other than your operating wavelength, the damage threshold must be scaled appropriately. Thus, an objective having a focal length of 8 millimeters in an infinity-correct microscope with a tube lens focal length of 200 millimeters would have a lateral magnification of 25x (200/8). In all of the imaging steps, with the exception of Image Plane (3'), the image is real and inverted. Light rays exiting the infinity-focused objective lens are collimated, so that beamsplitters, polarizers, Wollaston or Nomarski prisms, vertical illuminators and other components requiring a parallel beam can be easily introduced into the optical pathway. The adapter selection guide is a new feature and we are continuously improving this. A Response from Bweh E at Thorlabs in Newton: Thanks for contacting Thorlabs. The number of locations that are damaged at a particular power/energy level is recorded. I want to know where are the principal planes of the ITL200. These lenses can also be used for widefield imaging over their specified wavelength ranges. Hi, We don't have information on the front focal length. The microscope optical tube length, which is the distance between the tube lens rear principal plane and the intermediate image plane, is indicated in the tutorial diagram. This is AR-coated for the visible spectrum; we are in the process of measuring the transmittance over the next few weeks, and I will share these data with you as soon as they are available. Pulsed lasers often do not heat the optic enough to damage it; instead, pulsed lasers produce strong electric fields capable of inducing dielectric breakdown in the material. Can this tube lens used with a Leica Infinity-corrected objective? The LIO-20X Infinity Corrected Microscope Objective Lens has a 20x magnification, 0.40 numerical aperture, and 1.5 mm working distance. Alternatively, external SM2 threads on the top of the adapter allow externally SM2-threaded lenses to be connected via an SM2M05 lens tube. Abstract and Figures In this article, the design of a 45.5X (numerical aperture (NA) =0.5) infinity corrected, or infinite conjugate, Schwarzschild reflective microscope objective lens is. As long as the spacing between the tube lens and objective is less than 232.7mm, there will be no vignetting. Example 1: Camera MagnificationWhen imaging a sample with a camera, the image is magnified by the objective and the camera tube. In these systems, the image distance is set to infinity, and a tube (or telan) lens is strategically placed within . After passing through these auxiliary optical devices, the parallel light beam is made to converge and form an image by the tube lens. Also available: Navitar HR Objectives. Measured from the housing edge to the intermediate image plane (see the diagram below). This infinity corrected objective has a numerical aperture of 0.14, field of view on a " sensor of 1.28mm x 0.96mm, and resolving power of 2m. Response from Tim at Thorlabs to Reto: This is a Nikon tube lens offered for users to be able to design complete microscope systems from our standard components. (PDF 898KB). The distance between an infinity-corrected objective and the tube lens (L) can be varied from the recommended or optimal, but this will affect the image field diameter ($ \varnothing $). Response from Tim at Thorlabs: thank you for your feedback. Hi Team, If the optic was tested at a wavelength other than your operating wavelength, the damage threshold must be scaled appropriately [3]. | About Us | Imprint | The lenses are antireflection coated for the visible spectrum. There's not really any particular reason that one cannot be used with a different focal length such as the 200mm ITL200, but it should be noted that the magnification will increase by a factor of 200/180 (10/9). Response from Bweh E at Thorlabs.
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