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The SM38RR retaining ring can be used to lock the tube lens in place when using either adapter. Thanks. Widefield Tube Lens,f= 200mm, 240 - 360nm, Laser Scanning Tube Lens, f=200 mm, 400 - 2000nm, Widefield Tube Lens, f=180mm, 400 - 750 nm, Laser Scanning Tube Lens,f = 600 mm, 400 - 700nm. . Or is it the contact surface at the end of the thread? While it can work for some scanning applications (e.g. Is this tube lens ITL200 compatible with the Olympus Plan Fluorite objectives? The 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). Vintage Prepared Microscope Slide Mitutoyo M Plan Apo Zeiss Ph2 100X 1 30 Microscope Photo Eyepiece Oil 160 0 17 Photo Eyepiece Nikon Lwd Achromat Microscope . Because TL200 2P2 is too expensive that already beyond the budget. Professional high quality microscopes, microscope accessories, and magnifying lamps. This threading can be converted to external SM2 (2.035"-40) threading using the SM2A20 adapter available below. The lenses are antireflection coated for the visible spectrum. Infinity corrected objective lenses are the industry standard now. A response from Bweh Esembeson at Thorlabs USA: Thanks for contacting Thorlabs. 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. For reference, a Gaussian beam typically has a maximum power density that is twice that of the uniform beam (see lower right). Upon request, we can provide individual test information and a testing certificate. Endoscope; Microscope; Dental & Oral scanner; Ophthalmic Optical Equipment Test Metrology. I am not sure I fully understand your question. 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). These microscope systems have an image distance that is set to infinity. If using a 20X Nikon objective and a 0.75X Nikon camera tube, then the image at the camera has 20X 0.75X = 15X magnification. Objective working distance: 0.7mm. Light emerging from these objectives is instead focused to infinity, and a second lens, known as a tube lens, forms the image at its focal plane. Infinite Close Microscopes and components have two types of optical path design structures. | The LIO-20X Infinity Corrected Microscope Objective Lens has a 20x magnification, 0.40 numerical aperture, and 1.5 mm working distance. These companies offer objectives designed for use with the stated tube lens focal length. Could you specify the advantages over using achromatic lenses? Our tube lenses are corrected for chromatic aberrations independently of the selected objective lens, so the TL200-CLS2 can be paired with any Leica objective lens designed to be used with 200mm focal length tube lens. 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. I could not find the relevant info. When pulse lengths are between 1 ns and 1 s, laser-induced damage can occur either because of absorption or a dielectric breakdown (therefore, a user must check both CW and pulsed LIDT). For reference a Gaussian beam typically has a maximum energydensity that is twice that of the 1/e2 beam. | 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. 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. There are several standards including objectives that create images 160 mm and 170 mm away from the microscope objective. A good rule of thumb is that the damage threshold has a linear relationship with wavelength such that as you move to shorter wavelengths, the damage threshold decreases (i.e., a LIDT of 10 W/cm at 1310 nm scales to 5 W/cm at 655 nm): While this rule of thumb provides a general trend, it is not a quantitative analysis of LIDT vs wavelength. From your catalog, it is not clear, what exactly is the working distance. 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). Hello Tom, thank you for contacting Thorlabs. Fast free shipping within contiguous USA. If I can also use ITL200 in an IR system. I am wondering if it possible to get this optic either uncoated, or coated with your 'B' anti-reflection coating for 650-1050 nm? A 2/3" image sensor features an 11mm diagonal, therefore needs to be at least 11mm. If you make the most of these advantages, you can configure an optimal optical system by optionally taking in and out an intermediate lens unit within the parallel beam section between the objective lens and tube lens. Pulsed lasers with pulse lengths longer than 1 s can be treated as CW lasers for LIDT discussions. What is the transmittance? Correction for optical aberration in infinity systems is accomplished either through the tube lens or the objective (s). 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. 20mm mount thread (in diameter) Spring loaded for protecting lens and slides. Andrea. I am trying to model and then build a confocal microscope using Thorlabs parts. If there is one, what is the advantage of the TL200-CLS2 in terms of optical performance? Once refocused for a new center wavelength, the performance will be diffraction limited for some finite bandwidth around that wavelength. Mounting OptionsThese tube lenses feature external SM2 (2.035"-40) threading on one or both sides that connects to our 2" lens tubes and many elements of our 60mm Cage System. Furthermore, the NA and FOV will also change. Beam diameter is also important to know when comparing damage thresholds. The geometrical relationship between image planes in the optical microscope configured for infinity correction with a tube lens is explored in this tutorial. If you would like to discuss further, please email us at TechSupport@thorlabs.com. We focus on every detail when building this 1000x microscope, like incorporating springs into both the 40x and 100x objectives to mitigate the risk of damage to the slide or objective. The "Specs" tab lacks information on this distance values, e.g. Please see the "Magnification & FOV" tab for more information. Specifications LIDT in linear power density vs. pulse length and spot size. Available with either binocular or trinocular heads, this research level microscope also incorporates a very bright 6v 20W halogen illumination system and wide field 20mm eyepieces for a very crisp image. However, the distance from the opposite focal plane to the housing will be 238.1mm. I was very confused the diagram (tube lens schematic) and the description shown in the link the that lenses with external SM2 threads (TTL200-B and TTL200-S8) should be oriented the same as in the diagram. See the graphs in the table below for transmission data. Kenneth R. Spring - Scientific Consultant, Lusby, Maryland, 20657. | 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. Please see the "Specs" tab for more information. Unfortunately, it can be very difficult to compare the LIDT specification of an optic to your laser. VIEW PRODUCT Quick View 4X Plan Achromatic Objective Lens for Infinity-Corrected Metallurgical Microscopes Sku: PL4X-INF-V300 $35.99 $29.99. Cookies | About Us | Imprint | Principle Diagram of Infinity-corrected Optical System and Finite Correction Optical System. The dependence of the field of view on magnification is shown in the schematic to the right. Thanks, Hello 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. Next, the power/energy is either increased or decreased and the optic is exposed at 10 new locations. Greatings from Germany The longer the pulse duration, the more energy the optic can handle. Many thanks, 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. These lenses would not have the same performance as our diffraction limited tube lenses but may be more suitable to reduce the working distance of your optical system. You are being redirected to our local site. Many thanks in advance. In principle: Is the image plane for tube lenses supposed to coincide with the focal plane? The determination of these distances is best done in the modeling software we use to design the lenses (Zemax). Could you, please, comment why on your MTF graphs there is such a big difference in support range for TTL200MP vs TL200-2P2 / TL200-3P. The TTL200-B is AR coated for NIR wavelengths (650 - 1050nm), making it ideal for NIR fluorescence and NIR DIC imaging. If needed, the objective magnification can be adjusted as shown in Example 3. The energy density of your beam should be calculated in terms of J/cm2. Light focused by the objective produces an image at I(3) (the intermediate image) that is further magnified by the eyepiece to produce an image on the retina at I(4). Measured from the top edge of the housing to the image plane (see the diagrambelow). I will reach out to you to discuss your application further. If this is not the case, then the magnification of the system can still be calculated, but an effective objective magnification should be calculated first, as described below. The LIDT for an optic greatly depends on the type of laser you are using. As previously stated, pulsed lasers typically induce a different type of damage to the optic than CW lasers. This calculation assumes a uniform beam intensity profile. So are there any recommendations of NIR scan relay system from Thorlabs to meet our requirement? Example 4: Sample AreaThe dimensions of the camera sensor in Thorlabs' previous-generation 1501M-USB Scientific Camera are 8.98 mm 6.71 mm. I want to know where are the principal planes of the ITL200. Give your microscope a boost with greater power & clarity at a fraction of cost. 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. We have set your country/region to United States. Need to contact Edmund Optics? The specifications to the right are measured data for Thorlabs' TTL200-UVB Tube Lens. Alternatively, external SM2 threads on the top of the adapter allow externally SM2-threaded lenses to be connected via an SM2M05 lens tube. Larger 30mm Eyepiece Ocular Tubes! These objectives provide flexible observation at high magnifications and independent correction of chromatic aberration Long working distance provides clearance between the lens surface and the workpiece surface in focus for large or awkward workpieces The mounting screw threads of objectives are M26 x 36TPI and conform to JIS B-7141-1988 If you would like to use two tube lenses as a relay, the position of the telecentric pupil position is somewhere around 248 mm. Response from Chris at Thorlabs: The specified tolerance is +/-1%, but it is realistic to expect it to be closer to +/-0.5%. Microscope and Accessories Manufacturer and Wholesaler. Hello, thank you for contacting Thorlabs. Browse infinity conjugate lens at Edmund Optics. The TL200-CLS2 offers superior transmission in the operating range along with a significantly better axial color (focal length shift) performance. Included in this section are references to review articles, original research reports, and book chapters that discuss various aspects of the theory and applications regarding how microscopes are configured to take advantage of infinity optics. This is very disappointing. This process is repeated until damage is observed. Is this tube lens compatible with any of the Nikon CFI60 series objectives? This might lead you to believe that since the light . Contact Tech Support for more information. Besides a change in magnification ratio, what is the influence on the image of a reduced working distance? Thank you. - Mitutoyo Mplan 5 and 10x lens. Sitemap, Terms Of Use | Privacy Notice | We don't have information on the front focal length. When choosing optics, it is important to understand the Laser Induced Damage Threshold (LIDT) of the optics being used. Our objectives implement an innovative approach and plan-apochromat lenses that provide long working distance capabilities. Thanks for the feedback. Alex Maclean. If you have an additional relay lens (which is not typical), then that distance should correspond to the object plane of your relay lens. These lenses create a telecentric system when paired with our SL50-CLS2, SL50-2P2, and SL50-3P scan lenses, for use in point-by-point galvo scanning of the object plane. A lens is considered telecentric when the focal length falls at the aperture stop of a system, and this places your entrance or exit pupil at infinity (for object or image space telecentricity respectively). 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? Andreas. The highlighted columns in the table below outline the relevant pulse lengths for our specified LIDT values. Cookie Settings The glass in these tube lenses is highly absorptive below the lower limit of the stated range. Our laser scanning tube lenses with a wavelength range from 400 to 700nm or 450 to 1100nm can be paired with our SL50-CLS2 (450 - 1100nm) scan lens to create a telecentric system. This is because Leica (and Zeiss) microscopes have color correction inside their tube lens. At the moment zemax does not provide a method to convert a sequential block box model into a non-sequential mode. smooth X/Y calibrated movement with cross travel range 7.6cm x 5.2cm.
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