Dia20mm FL63.5mm Focus Lens D25mm Laser Head Tube for CO2 Cutting Machine | Wood Router

  Size

  Operating principle of LASER HEAD and Tube

 lens  mount always get broken during long time usage,

 so it might sometimes be needed to replace the

 broken one.

 Laser head tube is a device for installing the focus lens.

 This laser head tube designed for different focal length

 over which initially collimated (parallel) rays are

 brought to a focus. A system with a shorter focal

 length has greater optical power than one with a

 long focal length; that is, it bends the rays 

 more sharply, bringing them to a focus in a

 shorter distance.

 The rule of thumb:

 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.

 The focal depth refers to the depth of the specimen layer

 which is in sharp focus at the same time. 

 Depth of focus means the cutting thickness 

 of cutting/marking.  

 Focal point: 

 The point at which rays or waves meet after reflection or

 refraction, or the point from which diverging rays or waves

 appear to proceed.

 Focal point means the thickness of cutting/marking.

 Longer focal length means bigger focal spot, 

 longer depth of focus, but the mean power is 

 lower. Shorter focal length is contrary.

 <ENGRAVING>

 Graphics with fine detail, (resolution > 500 dpi), rubber 

 stamps  with thin letters  

 <CUTTING> Lower laser power, thin materials (e. g. paper),

 acrylic< 6 mm, wood of medium hardness < 8 mm.

 2" laser lens (standard for laser cutting machine, cutting 

 thin material)

 <CUTTING>Increases the distance between laser head 

 and material.

 Is especially useful if the increased distance is required 

 due to the material and the graphic

 2.5" laser lens (standard for laser cutting machine,

 cutting thick material)

 <CUTTING>High laser power, acrylic <12 mm, wood of medium

 hardness <15 mm
 Better quality of edges during laser cutting than for lower

 focal distances

 3" laser lens

 <CUTTING>

 4" laser lens

 <CUTTING>Foam rubber

 5" laser lens

 <CUTTING>High laser power, acrylic < 25 mm, wood of medium

 hardness < 20 mm
 Better quality of edges during laser cutting than for smaller 

 focal distances

  Laser Head

 Your laser cutting machine head looks like

 this with liner slide, with 25mm laser head

 tube.