Newsletter TRIOPTICS Global | English OptiTest® Visual optical measurement instruments The optical testing usually requires a wide range of configurations specific to the application or the parameters to be measured. The large variety of the set-ups is, however, a combination of basic optical instruments known as collimator, industrial telescope, diopter telescope, dynameter, autocollimator as well as mechanical hardware for positioning of the basic optical instruments. Reticle and filter changers are optionally available. To cover all conceivable testing set-ups required by fast changing applications, the components of OptiTest® line are designed as a modular system. Cost effectivity The modular design allows highest cost effectiveness due to identical basic components in each configuration. Flexibility Unlimited flexibility in test setups with basic components to cover current and future applications. The basic components are interchangeable and compatible with each other. Diversity TRIOPTICS offers autocollimators, collimators and telescopes with different focal lengths and objective tube diameters. In addition, there is a large selection of reticles, which can also be custom-made if required. Autocollimators The Autocollimator is a single instrument combining the functions of a collimator and a telescope. It detects small angular displacements of a mirror by means of its own collimated light. TRIOPTICS offers autocollimators with different focal lengths depending on the application. You can choose between a fixed focus setting with infinite setting and a variable focus setting with finite distance setting. Both versions are available with straight or 90° view. Autocollimator Autocollimators with fixed focus setting The two reticles of an autocollimator with fixed focus setting are positioned in the focal plane of the corrected objective lens, so that the emerging beam is parallel. This usual configuration is known as infinity setting, i.e the autocollimators are focused at infinity. Fixed focus setting with infinite setting Dual micrometer screw for shifting the reticle (optionally with digital display) available Technical Data Focusing Autocollimator Autocollimators with variable focus setting The reticles of a focusing Autocollimator (focusing Autocollimation telescope) can be moved out of the focal plane of the objective lens so that the autocollimator can be focused at finite distances. Variable focus adjustment with finite distance setting Dual micrometer screw for shifting the reticle (optionally with digital display) available Technical Data Large Field Autocollimator Large Field Autocollimators with fixed focus setting To meet customer requirements for testing optical instruments with large field of view, TRIOPTICS developed a unique line of autocollimators. 50 to 100% larger field of view in comparison to standard autocollimators Fixed focus setting with infinite setting Dual micrometer screw for shifting the reticle (optionally with digital display) available Technical Data Focusable Large Field Autocollimator Large Field Autocollimators with variable focus setting The reticles of a focusing autocollimator can be moved out of the focal plane of the objective lens so that the autocollimator can be focused at finite distances. 50 to 100% larger field of view in comparison to standard autocollimators Variable focus adjustment with finite distance setting Dual micrometer screw for shifting the reticle (optionally with digital display) available Technical Data Request OptiTest® Autocollimators Collimators TRIOPTICS offers different collimators depending on the measurement task. As a standard the collimators are set up in infinity setting meaning that they project the image of a reticle to infinity. TRIOPTICS offers collimators with different focal lengths depending on the application. You can choose between a fixed and a variable focus setting. Both versions are also available with a very large field of view. Collimator Collimators with fixed focus setting The Collimator is an optical instrument consisting of a well corrected objective lens with an illuminated reticle at its focal plane. The emerging beam is parallel (collimated beam), so that the image of the reticle is projected at infinity. The image of the reticle is projected into infinity at a wavelength of 546 nm (other wavelengths also available on request) The distance between reticle and objective lens is fixed Dual micrometer screw for shifting the reticle (optionally with digital display) available Technical Data Focusing Collimator Collimators with variable focus setting The reticle nozzle of the focusing collimator (finite distance setting) is mounted on an extendable tube to allow the focal point to be adjusted. This makes it possible to achieve finite and infinite distance settings. The focal point setting is variable and both a finite and infinite distance setting are possible Dual micrometer screw for shifting the reticle (optionally with digital display) available Technical Data Large Field Collimator Large field collimators with fixed focus setting To meet customer requirements for testing optical instruments with large field of view, TRIOPTICS developed a unique line of collimators providing a significant increase of field of view. 50 to 100% larger field of view in comparison to standard collimators The image of the reticle is projected to infinity Dual micrometer screw for shifting the reticle (optionally with digital display) available Technical Data Focusing Large Field Collimator Large field collimators with variable focus setting The focal point setting is variable and both a finite and infinite distance setting is possible. 50 to 100% larger field of view in comparison to standard collimators Dual micrometer screw for shifting the reticle (optionally with digital display) available Technical Data Request OptiTest® Collimators Telescopes TRIOPTICS offers different telescopes depending on the measurement task. As a standard the Industrial Telescopes are set up in infinity setting meaning that they image an object at a far distance into the image plane of the objective lens. TRIOPTICS offers industrial telescopes with different focal lengths depending on the application. They are available for straight or 90° angled viewing Telescope Industrial Telescope with fixed focus setting The Industrial Telescope is preset to infinity and images an object at a far distance into the image plane of the objective lens. The image is then magnified and visually inspected by an eyepiece. For measurement purposes usually a graduated reticle is located in the image plane. The magnification of the Industrial Telescope is given by the ratio of the objective focal length and the eyepiece focal length. The image is at an infinite or very large distance Optionally the industrial telescopes can be equipped with dual micrometers Optionally with reticle changer (RC) Technical Data Focusing Telescope Telescope with variable focus setting Attaching a draw out tube to the reticle adapter to move the reticle out of the focal of the objective lens, the standard telescope becomes a focusing telescope. Depending on the location of the reticle relatively to the focal plane, it results a real or a virtual image at a finite distance. The focal point setting is variable and both a finite and infinite distance setting are possible Optionally the test telescopes can be equipped with dual micrometers for measuring image angles in two different directions. Optionally with reticle changer (RC) Technical Data Large Field Telescope Large Field Telescope with fixed focus setting To meet the demands that customers are placing on the testing of optical instruments with a large field of view, TRIOPTICS has developed a new and unique range of test telescopes that are characterized by a significantly larger field of view. 50 to 100% larger field of view in comparison to standard test telescopes Optionally the test telescopes can be equipped with dual micrometers Optionally with reticle changer (RC) Technical Data Request OptiTest® Telescopes Dynameter Dynameter Measurement of magnification of telescopes The Dynameter is used in optical testing for: Measuring of the diameter of exit pupil Checking the distance between eyepiece and exit pupil Measurement of magnification of telescopes Technical Data Request OptiTest® Dynameter Diopter Telescopes Diopter Telescope Focusing telescope The Diopter telescope or dioptometer is a focusing telescope measuring the power of lenses in diopters. The results of the measurement can be read off on a graduated scale. Dioptometer can be attached to customer individual holders Nearly all TRIOPTICS Dioptometers have large graduations and permit easy reading Eyepieces are interchangeable and can be adapted to custom needs Technical Data Request OptiTest® Diopter Telescopes Reticles Types of reticles Collimator-reticles with standard field of view / Ø12 Collimator-reticles with large field of view / Ø25 Eyepiece-reticles with standard field of view / Ø12 Eyepiece-reticles with large field of view / Ø12 There are reticles for collimators and reticles for telescopes (Eyepiece-Reticle). For both types you have to distinguish between reticles for standard field of view and large field of view corresponding to the instrument you have chosen. For telescopes: Telescopes are used to observe objects that are imaged onto the eyepiece-reticle. For this reason it is recommended to use a positive eyepiece reticle. For collimators: Collimators image the structure imprinted on the reticle at some distance. Generally every reticle can be selected, but if fine structures are imaged it is recommended to use a negative reticle. For autocollimators: For autocollimators the right combination of reticles is important. RET-32 / RET-12 means RET-12 is the collimator-reticle and RET-32 is the eyepiece-reticle. Upgrades & Accessories In addition to the OptiTest® collimators, telescopes and autocollimators, TRIOPTICS offers a large range of opto-mechanical accessories, often required for certain standard applications. Holder Clamp fixture: Clamp fixture D38 Clamp fixture D57 Clamp fixture D115 Adjustable holders: Adjustable holder D38 Adjustable holder D57 Adjustable holder D115 Adjustable holder D140 Stativ: Stativ/Stand Stands: Manual Stand for D38 Manual Stand for D57 fixture for wedge measurement Stand V-Prisma (Magnetprisma): V-Prisma für Wellen D20 bis D50 V-Prisma für Wellen D50 bis D150 Mirrors Alignment tools Calibration tools Other accessories Knowledge Base Collimator The Collimator is an optical instrument consisting of a well corrected objective lens with an illuminated reticle at its focal plane. The emerging beam is parallel (collimated beam), so that the image of the reticle is projected at infinity. The collimator is usually set up in this way known as infinity adjustment (setting). When moving the reticle out of the focal plane of the objective lens, the shape of the emerging beam will change: Moving the reticle away from objective lens will result in a convergent beam. The image of the reticle is real and projected at a finite distance. Moving the reticle toward the objective lens will result in a divergent beam. If the beam diverges, a virtual image is produced at the apparent crossing point of the beam rays. This point is also located at a finite distance. This adjustment of the collimator is known as finite distance setting. The collimator is often used as a test chart projector for the inspection of infinity corrected objective lenses, e.g. photography lenses. In combination with a telescope, the collimator can also be used for aligning machine elements along the line of sight More knowledge for experts This article inspired you? Are you looking for further knowledge transfer? Then you might also be interested in the following topics… Electronic Autocollimators Collimator Collimator – Infinity setting Collimator – Distance settings Industrial Telescope The telescope is an optical tool that images an object at a far distance – usually preset to infinity – into the image plane of the objective lens. The image is then magnified and visually inspected by an eyepiece. For measurement purposes usually a graduated reticle is located in the image plane. The magnification of the telescope is given by the ratio of the objective focal length and the eyepiece focal length. When the incoming beam is parallel, the image observed through the telescope is located at infinity i.e at a long distance. This set up in is known as infinity setting. Similar to collimators, the telescopes can be focused at finite distances. Attaching a draw out tube to the reticle adapter to move the reticle out of the focal of the objective lens, the standard telescope becomes a focusing telescope. Depending on the location of the reticle relatively to the focal plane, it results a real or a virtual image at a finite distance. Telescope Autocollimator The autocollimator combines both optical tools, the collimator and the telescope into one instrument using a single objective lens. Both beam paths are separated by using a beam splitter. The autocollimator is a very sensitive angle measuring device and is thus used for the precise angular adjustment of optical or machine components. Due to the collimated beam (infinity adjustment) the measurement results are independent from the distance to the object under test. The operating principle is explained in the following. Like in the collimator the image of the illuminated object reticle is projected by the objective lens to infinity. In some distance, the collimated beam is reflected back from a mirrored surface. If the mirror surface is tilted by an angle α with respect to the optical axis, the reflected beam will enter the objective lens with an angle 2α. This leads to a shift d of the image in the image plane which can be calculated with the objective focal length f giving d = 2α x f or α = d/( 2f ). Thus, the sample angle is directly proportional to the measured shift in the image plane (small angles assumed). The resolution of an autocollimator increases proportionally and the angular field of view reciprocally with the focal length of the objective lens. Visual autocollimator Operating principle of an autocollimator Our Newsletter – Your advantage in knowledge Be one of the first to experience our product novelties and innovative application possibilities. 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