{"id":163600,"date":"2021-07-02T16:25:11","date_gmt":"2021-07-02T08:25:11","guid":{"rendered":"http:\/\/facfox.com\/docs\/?post_type=kb&p=163600"},"modified":"2021-07-01T16:30:21","modified_gmt":"2021-07-01T08:30:21","slug":"how-to-select-the-right-lens-for-your-laser-application","status":"publish","type":"kb","link":"https:\/\/facfox.com\/docs\/kb\/how-to-select-the-right-lens-for-your-laser-application","title":{"rendered":"How to select the right lens for your laser application"},"content":{"rendered":"
\n

\"\"<\/h2>\n

Choosing the right lens can be tricky<\/h2>\n<\/header>\n
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\n
\n

The parameters are fine and the focus is set correctly, but somehow the engraving is not correct. Has this ever happened to you? This is most likely a lens issue. The correct lens is just as important as the right parameters and optimal focus adjustment.<\/p>\n

To select the correct lens, you must consider the following:<\/p>\n<\/div>\n<\/section>\n<\/div>\n

\n
\n
\n
    \n
  • Output of your laser device<\/li>\n
  • Material<\/li>\n
  • Detail level of the graphics<\/li>\n
  • Resolution (dpi)<\/li>\n
  • Thickness of the material<\/li>\n<\/ul>\n
    \n

    The rule of thumb:<\/h2>\n<\/header>\n

    The more delicate and detailed the graphics are, the smaller the lens should be chosen. For cutting thick materials, lenses of maximum size are recommended. For detailed information, please see the table below.<\/p>\n

    \n

    The Speedy and SP lens portfolio<\/h2>\n<\/header>\n

    The following table shows all the lenses available for the lasers and their applications.<\/p>\n

    \n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
    1.5 inch CO2<\/sub><\/th>\nGraphics with fine detail, (resolution > 500 dpi), rubber stamps with thin letters<\/td>\nLower laser power, thin materials (e. g. paper), acrylic < 6 mm, wood of medium hardness < 8 mm.<\/td>\n<\/tr>\n
    2.0 inch CO2<\/sub><\/th>\nGraphics with medium detail and resolution (resolution 500 dpi; with reduced definition up to a resolution of 100 dpi), standard engraving<\/td>\nMedium laser power, acrylic < 8 mm, wood of medium hardness < 12 mm.<\/td>\n<\/tr>\n
    2.0 inch CO2<\/sub> clearance lens<\/th>\nMainly used for cutting<\/td>\nSee 2.0 inch lens.
    \nIncreases the distance between laser head and material. Is especially useful if the increased distance is required due to the material and the graphic<\/td>\n<\/tr>\n
    2.5 inch CO2<\/sub><\/th>\nGraphics with low detail, low resolution (< 500 dpi). Engraving on heat-sensitive materials (e. g. laminate) if large areas have to be removed completely<\/td>\nHigh laser power, acrylic <12 mm, wood of medium hardness <15 mm
    \nBetter quality of edges during laser cutting than for lower focal distances<\/td>\n<\/tr>\n
    2.5 inch CO2<\/sub> clearance lens<\/th>\nUsed mainly for cutting<\/td>\nSee 2.5 inch lens.
    \nIncreases the distance between laser head and material. Is especially useful if the increased distance is required due to the material and the graphic.<\/td>\n<\/tr>\n
    2.85 inch flexx<\/th>\nStandard lens for Speedy flexx series. Is transmissive for both CO\u2082 lasers and fiber lasers. Both laser sources can be used without changing the lens.<\/p>\n

    Other characteristics as 2.5 inch CO2<\/sub> lens or 3.2 inch fiber lens<\/td>\n

    		Characteristics as 2.5 inch CO2<\/sub> lens or 3.2 inch fiber lens<\/td>\n<\/tr>\n
    3.2 inch fiber<\/th>\nStandard lens for fiber lasers with extremely small focal diameter. Graphics with fine detail, ( > 500 dpi resolution)<\/td>\n<\/td>\n<\/tr>\n
    3.75 inch CO2<\/sub><\/th>\nLens for SP500 rotary engraving unit. Permits engraving of round objects with diameters of less than 50 mm<\/td>\n<\/td>\n<\/tr>\n
    4.0 inch CO2<\/sub><\/th>\nEngraving by burning of wood, laser engraving of graphics with low detail with high laser powers<\/td>\nFoam rubber<\/td>\n<\/tr>\n
    5.0 inch CO2<\/sub><\/th>\nIs not used for laser engraving<\/td>\nHigh laser power, acrylic < 25 mm, wood of medium hardness < 20 mm
    \nBetter quality of edges during laser cutting than for smaller focal distances<\/td>\n<\/tr>\n
    5.0 inch fiber<\/th>\nLens for fiber lasers if materials that are not absolutely plane are to be labeled. The greater focal distance results in a greater tolerance during focusing.<\/td>\n<\/td>\n<\/tr>\n
    7.5 inch CO2<\/sub> (for SP1500)<\/th>\nIs not used for laser engraving<\/td>\nHigh laser power, acrylic < 40 mm,
    \nBetter quality of edges during laser cutting than for smaller focal distances<\/td>\n<\/tr>\n<\/tbody>\n
    Lens<\/th>\nWhen to use for engraving\/marking<\/th>\nWhen to use for cutting<\/th>\n<\/tr>\n<\/thead>\n<\/table>\n<\/div>\n

    Please note that not every lens is available for each device. We will be happy to assist you in selecting the ideal lens.<\/p>\n

    \n

    Technical features in plain terms<\/h2>\n<\/header>\n
    \n
    \n
    \n

    The following is a glossary of the terms used to discuss lenses.<\/p>\n<\/div>\n<\/section>\n

    \n
    \n
    \n
    \n
    \n
    <\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n
    \n
    \n

    Focal length<\/h3>\n

    Distance between the lens and the point of the smallest beam diameter (= focus).<\/p>\n<\/div>\n<\/section>\n

    \n
    \n

    Focus<\/h3>\n

    The area where the laser beam is optimally focused and converges to the smallest possible beam diameter.<\/p>\n<\/div>\n<\/section>\n<\/div>\n

    \n
    \n
    \n

    Beam diameter<\/h3>\n

    The diameter of the laser beam which becomes greater and greater before and behind the focus.<\/p>\n

    The longer the focal distance of the lens, the greater the beam diameter. The energy of the laser is focused by the lens onto a defined focal point. The greater the focal distance of the lens, the greater also the surface onto which the energy of the laser is applied. This may mean that if you use a large lens, the material is heated rather than cut.<\/p>\n<\/div>\n<\/section>\n

    \n
    \n

    Focus tolerance (depth of focus)<\/h3>\n

    The area in which the beam has the smallest diameter.<\/p>\n

    The larger the lens (= the larger the focal length of the lens), the longer the focal tolerance. This means that the focus tolerance of a 5\u201d lens will be twice that of a 2.5\u201d lens. This is especially important if you want to cut through thick materials.<\/p>\n<\/div>\n<\/section>\n<\/div>\n<\/div>\n<\/section>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

    Choosing the right lens can be tricky The parameters are fine and the focus is set correctly, but somehow the engraving is not correct. Has this ever happened to you? This is most likely a lens issue. The correct lens is just as important as the right parameters and optimal focus adjustment. To select the […]<\/p>\n","protected":false},"author":4,"featured_media":163601,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"kbtopic":[45],"kbtag":[510,552,554,564],"class_list":["post-163600","kb","type-kb","status-publish","has-post-thumbnail","hentry","kbtopic-tech","kbtag-hardware","kbtag-laser-cut","kbtag-laser-engrave","kbtag-lens"],"yoast_head":"\nHow to select the right lens for your laser application - FacFox Docs<\/title>\n<meta name=\"description\" content=\"Choosing the right lens can be tricky The parameters are fine and the focus is set correctly, but somehow the engraving is not correct. 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