{"id":26933,"date":"2026-07-03T10:41:54","date_gmt":"2026-07-03T08:41:54","guid":{"rendered":"https:\/\/roder.it\/technologies\/optics-and-laser\/optical-stroboscopy\/"},"modified":"2026-10-06T13:33:26","modified_gmt":"2026-10-06T11:33:26","slug":"optical-stroboscopy","status":"publish","type":"page","link":"https:\/\/roder.it\/en\/technologies\/optics-and-laser\/optical-stroboscopy\/","title":{"rendered":"Optical stroboscopy"},"content":{"rendered":"\n<div class=\"wp-block-group is-layout-constrained wp-container-core-group-is-layout-61d584a3 wp-block-group-is-layout-constrained\">\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-ba02fbf7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:40%\">\n<figure class=\"wp-block-image size-full has-custom-border\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"1200\" src=\"https:\/\/roder.it\/wp-content\/uploads\/2026\/07\/shimpo-stroboscopi_serie_dt366-immagine_prodotto_frontale_anteriore-web_image-1200x1200-1.webp\" alt=\"LED stroboscope for optical stroboscopy of moving parts\" class=\"wp-image-15145\" style=\"border-width:1px;border-top-left-radius:20px;border-top-right-radius:20px;border-bottom-left-radius:20px;border-bottom-right-radius:20px\" srcset=\"https:\/\/roder.it\/wp-content\/uploads\/2026\/07\/shimpo-stroboscopi_serie_dt366-immagine_prodotto_frontale_anteriore-web_image-1200x1200-1.webp 1200w, https:\/\/roder.it\/wp-content\/uploads\/2026\/07\/shimpo-stroboscopi_serie_dt366-immagine_prodotto_frontale_anteriore-web_image-1200x1200-1-300x300.webp 300w, https:\/\/roder.it\/wp-content\/uploads\/2026\/07\/shimpo-stroboscopi_serie_dt366-immagine_prodotto_frontale_anteriore-web_image-1200x1200-1-1024x1024.webp 1024w, https:\/\/roder.it\/wp-content\/uploads\/2026\/07\/shimpo-stroboscopi_serie_dt366-immagine_prodotto_frontale_anteriore-web_image-1200x1200-1-150x150.webp?crop=1 150w, https:\/\/roder.it\/wp-content\/uploads\/2026\/07\/shimpo-stroboscopi_serie_dt366-immagine_prodotto_frontale_anteriore-web_image-1200x1200-1-768x768.webp 768w, https:\/\/roder.it\/wp-content\/uploads\/2026\/07\/shimpo-stroboscopi_serie_dt366-immagine_prodotto_frontale_anteriore-web_image-1200x1200-1-800x800.webp?crop=1 800w, https:\/\/roder.it\/wp-content\/uploads\/2026\/07\/shimpo-stroboscopi_serie_dt366-immagine_prodotto_frontale_anteriore-web_image-1200x1200-1-600x600.webp?crop=1 600w, https:\/\/roder.it\/wp-content\/uploads\/2026\/07\/shimpo-stroboscopi_serie_dt366-immagine_prodotto_frontale_anteriore-web_image-1200x1200-1-400x400.webp?crop=1 400w, https:\/\/roder.it\/wp-content\/uploads\/2026\/07\/shimpo-stroboscopi_serie_dt366-immagine_prodotto_frontale_anteriore-web_image-1200x1200-1-200x200.webp?crop=1 200w, https:\/\/roder.it\/wp-content\/uploads\/2026\/07\/shimpo-stroboscopi_serie_dt366-immagine_prodotto_frontale_anteriore-web_image-1200x1200-1-120x120.webp?crop=1 120w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:60%\">\n<p class=\"has-text-color has-background wp-block-paragraph\" style=\"border-radius:0px 6px 6px 0px;border-left-color:var(--wp--preset--color--ti-accent);border-left-style:solid;border-left-width:5px;color:#1A5276;background-color:#ebf1f4;padding-top:14px;padding-right:16px;padding-bottom:14px;padding-left:16px;font-size:clamp(14px, 0.875rem + ((1vw - 3.2px) * 0.769), 20px);font-style:italic\"><strong>Optical stroboscopy<\/strong> is a <strong>non-contact<\/strong> measurement and inspection technique: by illuminating a moving object with flashes of light at an adjustable frequency, it is made to appear stationary or slowed down, so that its rotational speed can be measured and its details inspected.<\/p>\n\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<ul class=\"wp-block-list is-style-checkbox has-ti-accent-color has-text-color has-link-color wp-elements-1\">\n<li><strong>Stroboscopic effect:<\/strong> a moving object that appears stationary<\/li>\n\n\n\n<li><strong>Non-contact RPM measurement:<\/strong> no wear or marks<\/li>\n\n\n\n<li><strong>Adjustable frequency:<\/strong> FPM and Hz, wide range<\/li>\n\n\n\n<li><strong>LED or xenon lamp:<\/strong> long life or intense flash<\/li>\n\n\n\n<li><strong>Phase delay:<\/strong> analysis at any point of the cycle<\/li>\n\n\n\n<li><strong>Flash duration:<\/strong> sharper images<\/li>\n\n\n\n<li><strong>Synchronisation:<\/strong> external sensor input<\/li>\n<\/ul>\n<\/div>\n<\/div>\n\n\n\n<div style=\"height:24px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Stroboscopy<\/strong> exploits persistence of vision: when a rotating or reciprocating part is illuminated by very short, repeated flashes of light, the eye perceives a sequence of &#8220;frozen&#8221; images. If the flash frequency coincides with the rotation frequency of the object (or with a submultiple of it), each flash illuminates the object in the same position every time and it appears <strong>stationary<\/strong>. By finely adjusting the frequency, the motion can be made to appear <strong>slowed down<\/strong>, forwards or backwards.  <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Because the measurement is purely optical and non-contact, it introduces no friction or wear, leaves no marks on the surface and does not require the machine to be stopped, making it ideal for process control and predictive maintenance. RODER offers the technology with the range of LED and xenon <a href=\"https:\/\/roder.it\/strumenti\/stroboscopi-industriali\/\">Shimpo stroboscopes<\/a>. <\/p>\n<\/div>\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<div class=\"wp-block-cover is-light popmake-11245\" style=\"border-width:1px;border-top-left-radius:10px;border-top-right-radius:10px;border-bottom-left-radius:10px;border-bottom-right-radius:10px;min-height:250px;aspect-ratio:unset;\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"213\" class=\"wp-block-cover__image-background wp-image-14896 size-large\" alt=\"banner aiuto nella scelta dello strumento oppure della tecnologia\" src=\"https:\/\/roder.it\/wp-content\/uploads\/2026\/06\/banner_technical_support_choose_products-1024x213.png\" data-object-fit=\"cover\" srcset=\"https:\/\/roder.it\/wp-content\/uploads\/2026\/06\/banner_technical_support_choose_products-1024x213.png 1024w, https:\/\/roder.it\/wp-content\/uploads\/2026\/06\/banner_technical_support_choose_products-300x63.png 300w, https:\/\/roder.it\/wp-content\/uploads\/2026\/06\/banner_technical_support_choose_products-768x160.png 768w, https:\/\/roder.it\/wp-content\/uploads\/2026\/06\/banner_technical_support_choose_products.png 1200w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><span aria-hidden=\"true\" class=\"wp-block-cover__background has-background-dim\" style=\"background-color:#d3d6dc\"><\/span><div class=\"wp-block-cover__inner-container is-layout-constrained wp-container-core-cover-is-layout-a304f9a9 wp-block-cover-is-layout-constrained\">\n<p class=\"has-text-align-right has-ti-fg-color has-text-color has-link-color wp-elements-2 wp-block-paragraph\" style=\"font-size:clamp(21.536px, 1.346rem + ((1vw - 3.2px) * 1.726), 35px);\"><strong>Would you like help choosing the right product ?<\/strong><\/p>\n\n\n\n<div class=\"wp-block-buttons is-content-justification-right is-layout-flex wp-container-core-buttons-is-layout-b507c051 wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/roder.it\/en\/contacts\/\">Click here !<\/a><\/div>\n<\/div>\n<\/div><\/div>\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<h2 class=\"wp-block-heading has-ti-accent-color has-text-color\">What the stroboscopic effect is<\/h2>\n\n<p class=\"wp-block-paragraph\">The stroboscopic effect is based on the relationship between the <strong>flash frequency<\/strong> and the <strong>frequency of the motion<\/strong>. When the two frequencies are equal, the object is always illuminated at the same phase of its cycle and appears motionless. If the flash frequency is an exact multiple or submultiple of the rotation frequency, several equally spaced images or a single stationary image are seen. The frequency is expressed in <strong>flashes per minute (FPM)<\/strong> or in <strong>hertz (Hz)<\/strong>; Shimpo stroboscopes cover very wide ranges, from 30\u201360 up to 120,000 FPM in the LED models.   <\/p>\n\n<h2 class=\"wp-block-heading has-ti-accent-color has-text-color\">How rotational speed (RPM) is measured<\/h2>\n\n<p class=\"wp-block-paragraph\">To measure the speed of a rotating part, the flash frequency is gradually increased until a <strong>single stationary image<\/strong> is obtained. It is important to check that you are not on a submultiple: at half the frequency, for example, the image may appear stationary depending on the symmetry of the object. Once the frequency corresponding to the first unambiguous stationary image has been found, the reading in FPM is equal to the speed in <strong>revolutions per minute<\/strong>. The <strong>\u00d72 \/ \u00f72<\/strong> functions and the <strong>+\/\u2212<\/strong> fine tuning of the Shimpo models speed up this search.   <\/p>\n\n<h2 class=\"wp-block-heading has-ti-accent-color has-text-color\">LED lamp and xenon lamp<\/h2>\n\n<p class=\"wp-block-paragraph\">The light source determines performance and field of use. <strong>LED<\/strong> technology (used by the <a href=\"https:\/\/roder.it\/strumenti\/stroboscopi-industriali\/stroboscopi-industriali-serie-st-4000-6\/\">ST-4000<\/a>, <a href=\"https:\/\/roder.it\/strumenti\/stroboscopi-industriali\/stroboscopi-industriali-serie-st-5000\/\">ST-5000\/ST-5100<\/a>, <a href=\"https:\/\/roder.it\/strumenti\/stroboscopi-industriali\/stroboscopi-industriali-serie-dt-366\/\">DT-366<\/a>, <a href=\"https:\/\/roder.it\/strumenti\/stroboscopi-industriali\/stroboscopi-industriali-serie-dt-326\/\">DT-326<\/a> and <a href=\"https:\/\/roder.it\/strumenti\/stroboscopi-industriali\/stroboscopi-industriali-serie-st-320bl\/\">ST-320BL<\/a>) offers a very long life with no bulb replacement and very wide frequency ranges (up to 120,000 FPM). The <strong>xenon<\/strong> lamp (models <a href=\"https:\/\/roder.it\/strumenti\/stroboscopi-industriali\/stroboscopi-industriali-serie-dt-735\/\">DT-735<\/a> and <a href=\"https:\/\/roder.it\/strumenti\/stroboscopi-industriali\/stroboscopi-industriali-serie-dt-311d\/\">DT-311D<\/a>) produces an extremely short (10\u201330 \u00b5s) and intense flash, very effective for detail, with a typical range of up to 12,000 FPM.  <\/p>\n\n<h2 class=\"wp-block-heading has-ti-accent-color has-text-color\">Phase delay and flash duration<\/h2>\n\n<p class=\"wp-block-paragraph\">Two advanced adjustments extend the analysis. The <strong>phase delay<\/strong> (in degrees, up to 0\u2013359\u00b0 on advanced models) makes it possible to &#8220;freeze&#8221; the object at any point of its cycle, in order to observe all its phases progressively. The adjustable <strong>flash duration<\/strong> reduces motion blur and produces sharper images for detailed inspection. With the <strong>external sensor input<\/strong>, the flash frequency can also be synchronised automatically with the speed of the process.   <\/p>\n\n<h2 class=\"wp-block-heading has-ti-accent-color has-text-color\">Applications of optical stroboscopy<\/h2>\n\n<ul class=\"wp-block-list is-style-checkbox has-ti-accent-color has-text-color has-link-color wp-elements-3\">\n<li><strong>Predictive maintenance<\/strong> of motors, shafts, fans and impellers<\/li>\n\n\n\n<li><strong>Inspection<\/strong> of moving gears, cams, belts and pulleys<\/li>\n\n\n\n<li><strong>Quality control<\/strong> in printing, packaging and textiles<\/li>\n\n\n\n<li><strong>Vibration analysis<\/strong> and balancing checks<\/li>\n\n\n\n<li><strong>Non-contact RPM checks<\/strong> on production lines<\/li>\n<\/ul>\n\n<p class=\"wp-block-paragraph\">For practical use in process control, see the in-depth article <a href=\"https:\/\/roder.it\/applicazioni-e-soluzioni\/automazione-e-processo-industriale\/monitoraggio-rpm-e-velocita-di-rotazione-delle-macchine\/\">Monitoring RPM and rotational speed of machines<\/a>.<\/p>\n\n<h2 class=\"wp-block-heading has-ti-accent-color has-text-color\">RODER products for optical stroboscopy<\/h2>\n\n<p class=\"wp-block-paragraph\">RODER distributes the complete range of <a href=\"https:\/\/roder.it\/strumenti\/stroboscopi-industriali\/\">Shimpo stroboscopes<\/a>, LED and xenon, portable battery-powered or mains-powered, with a UV light version for UV ink printing: <a href=\"https:\/\/roder.it\/strumenti\/stroboscopi-industriali\/stroboscopi-industriali-serie-st-4000-6\/\">ST-4000<\/a>, <a href=\"https:\/\/roder.it\/strumenti\/stroboscopi-industriali\/stroboscopi-industriali-serie-st-5000\/\">ST-5000\/ST-5100<\/a>, <a href=\"https:\/\/roder.it\/strumenti\/stroboscopi-industriali\/stroboscopi-industriali-serie-dt-735\/\">DT-735<\/a>, <a href=\"https:\/\/roder.it\/strumenti\/stroboscopi-industriali\/stroboscopi-industriali-serie-dt-311d\/\">DT-311D<\/a>, <a href=\"https:\/\/roder.it\/strumenti\/stroboscopi-industriali\/stroboscopi-industriali-serie-dt-366\/\">DT-366<\/a>, <a href=\"https:\/\/roder.it\/strumenti\/stroboscopi-industriali\/stroboscopi-industriali-serie-dt-326\/\">DT-326<\/a> and <a href=\"https:\/\/roder.it\/strumenti\/stroboscopi-industriali\/stroboscopi-industriali-serie-st-320bl\/\">ST-320BL<\/a>.<\/p>\n\n<h2 class=\"wp-block-heading has-ti-accent-color has-text-color\">Stroboscopy and vibration analysis<\/h2>\n\n<p class=\"wp-block-paragraph\">As well as measuring RPM, stroboscopy is an effective tool for <strong>vibration analysis<\/strong>. By adjusting the flash frequency close to the rotation frequency, components that vibrate or have play appear to move slowly, making visible resonances, loosening, misalignments and imbalances that are difficult to observe with the naked eye. This visual analysis, carried out while the machine is running, helps to diagnose the cause of abnormal noise and vibration and to verify the outcome of balancing or tightening work.  <\/p>\n\n<h2 class=\"wp-block-heading has-ti-accent-color has-text-color\">Safety and sectors of use<\/h2>\n\n<p class=\"wp-block-paragraph\">Shimpo stroboscopes use <strong>LED<\/strong> or <strong>xenon<\/strong> lamps, with no harmful laser light: this simplifies in-line use and reduces optical safety requirements. The technology is used across the <strong>printing, packaging, textile, automotive, cable, paper, steel, chemical and medical<\/strong> sectors, wherever it is necessary to check speed or inspect fast-moving parts without stopping production. The combination of measurement and inspection in a single portable instrument makes it a valuable aid for maintenance and quality control departments.  <\/p>\n\n<h2 class=\"wp-block-heading has-ti-accent-color has-text-color\">Frequently asked questions<\/h2>\n\n<div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-0\"><strong class=\"schema-faq-question\">What is optical stroboscopy?<\/strong> <p class=\"schema-faq-answer\">It is a non-contact measurement and inspection technique that illuminates a moving object with flashes of light at an adjustable frequency: when the flash frequency coincides with that of the motion, the object appears stationary, allowing its rotational speed to be measured and its details to be inspected.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-1\"><strong class=\"schema-faq-question\">How is rotational speed measured with a stroboscope?<\/strong> <p class=\"schema-faq-answer\">The flash frequency is adjusted until the rotating part appears as a single, unambiguous stationary image: the frequency in FPM is equal to the speed in revolutions per minute, checking that you are not on a submultiple.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-2\"><strong class=\"schema-faq-question\">Is an LED or a xenon stroboscope better?<\/strong> <p class=\"schema-faq-answer\">LED models offer long life and very wide ranges (up to 120,000 FPM); xenon models produce a very short, intense flash (10\u201330 \u00b5s) ideal for detail, up to 12,000 FPM.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-3\"><strong class=\"schema-faq-question\">Does stroboscopy require laser light?<\/strong> <p class=\"schema-faq-answer\">No: Shimpo stroboscopes use LED or xenon lamps, with no harmful laser light.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-4\"><strong class=\"schema-faq-question\">What is the phase delay for?<\/strong> <p class=\"schema-faq-answer\">It makes it possible to &#8220;freeze&#8221; the object at any point of the cycle (0\u2013359\u00b0) in order to analyse all the phases of the motion progressively.<\/p> <\/div><\/div>\n\n<h2 id=\"prodotti-collegati\" class=\"wp-block-heading has-ti-accent-color has-text-color\">Related products<\/h2>\n\n<p class=\"wp-block-paragraph\">The RODER instruments for this application. Go to the relevant catalogue pages for models, technical data and documentation. <\/p>\n\n<div class=\"wp-block-group is-layout-grid wp-container-core-group-is-layout-b251d530 wp-block-group-is-layout-grid\">\n<div class=\"wp-block-group has-border-color has-white-background-color has-background is-layout-constrained wp-container-core-group-is-layout-10ff9433 wp-block-group-is-layout-constrained\" style=\"border-color:#e0e0e0;border-width:1px;border-radius:8px;padding:16px\">\n<figure class=\"wp-block-image size-large has-custom-border\"><a href=\"https:\/\/roder.it\/en\/products\/stroboscopes-for-industrial-applications\/\"><img decoding=\"async\" src=\"https:\/\/roder.it\/wp-content\/uploads\/2019\/06\/prodotti_stroboscopi.png\" alt=\"Industrial stroboscopes\" style=\"border-radius:6px;aspect-ratio:4\/3;object-fit:contain\"\/><\/a><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" style=\"font-size:clamp(14px, 0.875rem + ((1vw - 3.2px) * 0.385), 17px);\"><a href=\"https:\/\/roder.it\/en\/products\/stroboscopes-for-industrial-applications\/\">Industrial stroboscopes<\/a><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\" style=\"font-size:14px\">Xenon and LED stroboscopes for motion analysis and RPM measurement.<\/p>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link has-custom-font-size wp-element-button\" href=\"https:\/\/roder.it\/en\/products\/stroboscopes-for-industrial-applications\/\" style=\"font-size:14px\">Browse the catalogue<\/a><\/div>\n<\/div>\n<\/div>\n<\/div>\n\n<div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\">\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h4 class=\"wp-block-heading has-ti-accent-color has-text-color has-link-color wp-elements-4\">Contacts &amp; Information<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Contact for general information : <a href=\"mailto:info@roder.it\">info@roder.it<\/a><br\/><br\/>Machine Vision Division of RODER : <a href=\"http:\/\/www.rodervision.com\">www.rodervision.com<\/a><br\/>RODER Instruments Division : <a href=\"http:\/\/www.rodervision.com\">www.innovacheck.com<\/a><br\/>More about RODER : <a href=\"https:\/\/roder.it\/en\/contacts\/\">about us<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The information contained in this website is provided for information purposes only. Although it has been prepared with the greatest care, it does not constitute a contractual offer or a binding commitment to supply. It may contain transcription, translation or typographical errors. For precise and up-to-date information, please contact our company directly.   <\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Note:<\/strong> Some images on this website have been intentionally generated using artificial intelligence (AI). This is because, for many applications and projects, photographs of the actual installation or system cannot be disclosed owing to confidentiality agreements, contractual clauses and non-disclosure agreements (NDAs). <\/p>\n\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Optical stroboscopy is a non-contact measurement and inspection technique: by illuminating a moving object with flashes of light at an adjustable frequency, it is made to appear stationary or slowed down, so that its rotational speed can be measured and its details inspected. 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