While double-checking that, I also noticed that theTTL100-A is 33.5 mm, not 31.1 mm as shown in the specs table as of this post (we must have accidentally swapped the dimension for the two at the time of listing these parts on the web). Infinity corrected optical systems are used in research laboratory microscopes and industrial metallurgical microscopes. Microscope and Accessories Manufacturer and Wholesaler. Careers 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. Imprint | The camera sensor dimensions can be obtained from the manufacturer, while the system magnification is the multiplicative product of the objective magnification and the camera tube magnification (see Example 1). Could you specify the advantages over using achromatic lenses? While the above procedure provides a good rule of thumb for LIDT values, please contact Tech Support if your wavelength is different from the specified LIDT wavelength. A response from Bweh Esembeson at Thorlabs USA: Thanks for contacting Thorlabs. I will reach out to you to discuss your application further. The TL200MP is designed for a wavelength range of 400-2000nm, while the TL200-3P is designed for 900-1900 nm. For example, diffraction-limited performance can be achieved using the. This is Section 9.2 of the Imaging Resource Guide. This allows us to track the use of our websites and social media, facilitate their functionality and optimize content. Sorry, this page is not available in your country. Are there any differences between the two lenses with respect to chromatic shifts that would impact 2-color imaging differently. There are several standards including objectives that create images 160 mm and 170 mm away from the microscope objective. I have the same question (and some more): is the ITL200 similar to the tube lenses found in Olympus or Nikon microscopes? I purchased this ITL200 lens and it seems to me that the front focal length is more like 250mm by trying to image an obect located at > 10x the measured focal lens (assumed to be infinity). SM1.5 (1.535"-40) threading at each end of the tube lens can also be used for mounting or converted to external SM2 (2.035"-40) threading using the SM2A57 thread adapter. For reference, a 22 mm field size is large enough to fill a4/3" format camera sensor. Besides a change in magnification ratio, what is the influence on the image of a reduced working distance? This phenomenon is possibly introduced by the lateral chromatic aberration of our scan relay system because we observed that the FOV is better when using 900 nm than 800 nm. The sample area calculation, decreasing with increase of system magnification, represents the dimensions of the image we visualize on the camera or the field of view with image size equal to the camera sensor dimensions. Optical elements that produce magnification include objectives, camera tubes, and trinocular eyepieces, as shown in the drawing to the right. Hello, thank you for contacting Thorlabs. Hi, I have a query on the sample area calculation. Our standard widefield tube lenses for the visible wavelength range can also be used for laser scanning purposes when paired with the CLS-SL visible scan lens for example. It arrived with kapton tape stuck onto the two sides of the lens (inside dusty paper padding). Standard Widefield Tube LensesOur widefield tube lenses are AR-coated for high transmission and provide diffraction-limited axial color performance for the UV, visible, and NIR wavelength ranges; see the Specs tab for performance data. Dear ladies and gentleman, We will correct this information on the website as soon as possible. ITL20020X21.6Zemax. Infinity Optical Systems. Objective lens: Infinity-corrected PLAN field achromatic 100X/0.8, /0, dry, spring. MTF . The MTF scales with the inverse of the wavelength so the 3P will have roughly twice the cutoff frequency compared to the TL200MP. Description and Specification of Infinity Corrected Binocular Microscope for Lab Tenders Infinity Corrected Binocular Microscope Manufacturers and Suppliers India Stage: 145mm x 140mm built-in double layer mechanical stage. Nikon manufactures the ITL200, so we do not have a full design comparison against our own TTL200. About Us, Terms Of Use | We don't have information on the front focal length. Note that the guideline presented here assumes room temperature operation and optics in new condition (i.e., within scratch-dig spec, surface free of contamination, etc.). In all of the imaging steps, with the exception of Image Plane (3'), the image is real and inverted. This is the optimal distance between the lens and the objective (see the diagram below). The glass in these tube lenses is highly absorptive below the lower limit of the stated range. We have updated the diagram accordingly. Alex Maclean. TTL series lenses are designed to provide diffraction-limited performance from 240 to 700 nm (for the TTL200-UVB) or from 400 to 2000 nm (for all other TTL series lenses); however, the working distance is valid only over the specified design wavelength range. Thank you! Thanks, Login ; Home; These tube lenses are engraved with an arrow next to an infinity symbol () to indicate which side of the lens should face the objective (infinity space). Sorry, this page is not I am wondering if it possible to get this optic either uncoated, or coated with your 'B' anti-reflection coating for 650-1050 nm? Between the raynox and the camera I've a extension bellows at 100mm. 200mm Effective Focal Length Used by Thorlabs, Nikon, Leica, and Mitutoyo, 300mm, 400mm, and 600mm Effective Focal Lengths for Increased Magnification in Standard Systems. Hello Tom, thank you for contacting Thorlabs. In this regime, the LIDTgiven as a linear power densitycan be applied to any beam diameter; one does not need to compute an adjusted LIDT to adjust for changes in spot size, as demonstrated by the graph to the right. The optic is exposed in 10 locations to this laser beam for 30 seconds (CW) or for a number of pulses (pulse repetition frequency specified). One advantage to using an infinity-corrected objective with a tube lens is that there can be a space between the objective and tube lens. Could you please specify the focal length tolerance on this lens system? 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. We will discuss the possibility of offering this customization directly. Thank you for your feedback, an achromatic doublet lens with a shorter working distance could potentially be used such as the ones below. We will look into having these as a stock item subsequently. 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. SM2AD36 is exactly what I was looking for! If this camera is used with the Nikon objective and trinoculars from Example 1, which have a system magnification of 15X, then the image area is: The images of a mouse kidney below were all acquired using the same objective and the same camera. In principle: Is the image plane for tube lenses supposed to coincide with the focal plane? Because the focal length of the tube lens varies between 160 and 250 millimeters (depending upon the manufacturer and model), the focal length of the objective can no longer be assumed to be 160 millimeters divided by its magnification. These companies offer objectives designed for use with the stated tube lens focal length. Infinity corrected objective lenses are the industry standard now. Therefore, (4)L= (24mm11.2mm)200mm 11mm =232.7mm L = ( 24 mm 11.2 mm) 200 mm 11 mm = 232.7 mm Unfortunately, it can be very difficult to compare the LIDT specification of an optic to your laser. Because the focal length of the tube lens varies between 160 and 250 millimeters (depending upon the manufacturer), the focal length of the objective can no longer be assumed to be 160 millimeters divided by its magnification. These lenses are engraved with an arrow next to an infinity symbol () to indicate which side of the lens should face the objective (infinity space), as shown in the diagram above. Where L is the distance between the objective and the tube lens, $ \small{\varnothing _2} $ is entrance pupil of the tube lens, $ \small{f_2} $ is focal length of the tube lens, and $ \small{\varnothing } $ is the image field diameter. Strangely, this component is not listed in the table of adapters, therefore, I could not find it. After passing through these auxiliary optical devices, the parallel light beam is made to converge and form an image by the tube lens. Part #. Quick View. Tax Certificates. Thanks! Please see the "Specs" tab for more information. Once refocused for a new center wavelength, the performance will be diffraction limited for some finite bandwidth around that wavelength. We will take your input into consideration in the design of a future product. | 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. 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? For Objectives it is usually the most top layer of the objective. The axial color plots and performance data can be used for guidance when adjusting the working distance. The wording of this inquiry leaves a bit of room for misunderstanding. When comparing an LIDT specified for a pulsed laser to your laser, it is essential to know the following: LIDT in energy density vs. pulse length and spot size. For more information on cleaning optics, please see our Optics Cleaning tutorial. This means that both CW and pulsed damage thresholds must be compared to the laser beam to determine whether the optic is suitable for your application. A histogram such as that below represents the testing of one BB1-E02 mirror. While the working distance on one side of the lens is 148mm I was surprised to find that the pupil plane is ~290mm on the other side of the lens. Long-Working-Distance Microscope Optics Mitutoyo infinity corrected microscope objective lenses have set the standard of excellence for long working distance microscope optics. If the tube lens is not placed at a distance close to 180 mm, you can have vignetting or performance from optical aberrations may cause the image to degrade. These lenses can also be used for widefield imaging over their specified wavelength ranges. Now compare the maximum energy density to that which is specified as the LIDT for the optic. This is because Leica (and Zeiss) microscopes have color correction inside their tube lens. Response from Chris at Thorlabs: Thank you for using our feedback tool. Please keep in mind that these tests are performed on clean optics, as dirt and contamination can significantly lower the damage threshold of a component. smooth X/Y calibrated movement with cross travel range 7.6cm x 5.2cm. The overall length Spec listed is 33.5mm, but the CAD and PDF shows 31.1mm. The dependence of the field of view on magnification is shown in the schematic to the right. This threading can be converted to external SM2 (2.035"-40) threading using the SM2A20 adapter available below. A magnification does not change even if the distance between the objective lens and tube lens is changed. To integrate one of these tube lenses with Thorlabs' Cerna DIY Microscopy Systems, use the SM2M05 lens tube to connect to the WFA4111 Dovetail Adapter (available below). For reference, a Gaussian beam typically has a maximum power density that is twice that of the uniform beam (see lower right). Thank you for contacting Thorlabs. Thank you for contacting Thorlabs. Because dust or other particles on the surface of an optic can cause damage at lower thresholds, we recommend keeping surfaces clean and free of debris. This process is repeated until damage is observed. Kenneth R. Spring - Scientific Consultant, Lusby, Maryland, 20657. Thanks. Our sales team (sales@thorlabs.com) will reach out to you directly to discuss your shipping options. The image, or images, are then reviewed and calibration measurements are retrieved from the image. Are you absolutely sure that the Zemax *Forward* and *Reverse* Black Box models for this tube lens are correct? Correction for optical aberration in infinity systems is accomplished either through the tube lens or the objective (s). In an infinity-corrected optical system, the light beam transmitted from a specimen being observed, passes through the objective lens and does not form an image; instead it continues as an infinity parallel beam in the tube lens which then forms an intermediate image. lens tube to connect to the WFA4111 Dovetail Adapter (available below). Privacy Notice | Cookies | Cookie Settings | It is important to note that the magnification quoted in these products' specifications is usually only valid when all optical elements are made by the same manufacturer. While it can work for some scanning applications (e.g. If I can also use ITL200 in an IR system. Microscope and Accessories Manufacturer and Wholesaler. Infinite Close Microscopes and components have two types of optical path design structures. Is this tube lens ITL200 compatible with the Olympus Plan Fluorite objectives? 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. In this regime, the LIDT given as anenergy density can be applied to any beam diameter; one does not need to compute an adjusted LIDT to adjust for changes in spot size. The TTL200 and ITL200 tube lenses should be inserted with the M38 x 0.5 threading facing the objective, while all other standard widefield tubelenses are engraved with an arrow next to an infinity symbol () to indicate which side of the lens should face the objective (infinity space), as shown in the diagram above. Telecentric Pupil Distance is roughly the focal length when the lens is used in the reverse direction. Is it anti-reflection coated? 91, 127402 (2003). In these systems, the image distance is set to infinity, and a tube (or telan) lens is strategically placed within . Jainco is renowned Exporter and Manufacturer of Infinity Corrected Binocular Microscope, Infinity Corrected Binocular Microscope Suppliers, Infinity Corrected Binocular Microscope Manufacturers throughout the world to be used in Schools, College and Universities [email protected] +0171-2642492; About; Certificates; 0. The lens will need to be refocused when used at other wavelengths.
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