A User Guide To Magnifiers

 How to select a magnifier best suited to your need ?

A perfect magnifier would have high power, large area, light weight, high working distance and crystal clear distortion free magnification. But a perfect magnifier incorporating all these properties is impossible as per basic laws of physics. You have to give up one advantage to gain another.

1. Magnification  Is the number of times an object will look bigger when viewed through the magnifier. With increased magnification, you will be able to view finer details of the magnified object with corresponding decrease in other below mentioned properties. Your aim therefore should be to select lower magnification that will enable you to see all the details you need to see in your given application.
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2. Field Of View  Is the area or size of the object that you will be able to see through the magnifier. Field of view declines rapidly with increase in magnification.
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3. Working Distance  Is the distance that has to be maintained between the magnifier lens and the object being viewed in order to keep the object in sharp focus. This is an important property if your work involves use of tools on the object under magnification. For example to assemble watch parts using a screw driver you will need adequate space between the magnifier and the watch to operate the screwdriver.
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4. Quality Of Image  The magnified view as seen through the magnifier should be bright, sharp, with out color fringes and with out distortion through out the entire field of view. Simple and relatively economical lenses can provide high image quality at lower magnifications. But at higher magnifications, one has to opt for complex multi lenses systems to get good quality image.
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5. Depth Of Field  Is the distance between the closest and farthest point ( on the object being viewed) at which the magnifier remains in focus. for example, if you are viewing an uneven surface or a three dimensional solid object such as rock sample, a magnifier with a small depth of field will not be able to keep the entire object in focus at the same time.
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6. Eye Relief.  Is the maximum distance you can keep the magnifier from your eye and yet get to see the magnified image of the entire object. Larger eye relief provides greater viewing comfort to the user. Hence you should go for larger eye relief if your application requires hours of viewing through the magnifier. Like all the other properties mentioned above, eye relief also generally goes down as the power of the magnifier goes up.

Mechanical configuration :-

Depending up on your requirements, you should decide between the following types :

 

 

Optical Instruments
Fresnel Wallet Magnifiers   Fresnel Book Magnifiers   Large Area Illuminated Magnifiers   Flexible Arm Illuminated Magnifiers TV Filter cum Magnifiers       Cut Away Stand Magnifiers   Pocket Magnifiers   Stand Magnifiers     Graticule Magnifiers   Illuminated Graticule Magnifiers  Pocket Magnifiers  Pocket Wide Field Magnifiers   Hand Held Magnifiers  Stereo Eyeglass Magnifiers   Measuring Microscopes   Pocket Microscopes  Stereo Microscopes   Flexible Fiber Optic Illuminators   Eye Loupes   Head Loupes   Hastings Triplet Loupes   Folding Loupes  Directory Reader   Reading Glasses

Measuring Instruments
Plain Plug Gauges  Plain Ring Gauges  Thread Plug Gauges Metric  Thread Ring Gauges Metric Thread Plug Gauges NPT  Thread Ring Gauges NPT  Thread Plug Gauges NPTF  Thread Ring Gauges NPTF Thread Plug Gauges BSP  Thread Ring Gauges BSP  Thread Plug Gauges BSPT  Thread Ring Gauges BSPT Thread Plug Gauges UNF  Thread Ring Gauges UNF  Thread Plug Gauges UNEF  Thread Ring Gauges UNEF  Thread Plug Gauges UNC  Thread Ring Gauges UNC  Plunger Dial Gauges  Lever Dial Test Indicators  Comparator Stands   Transfer Stands   Toolmaker's Clamps   Block Levels   Square Levels   Precision Squares  Outside Micrometers   Vernier Calipers  Combination Sets  Feeler Gauges  Bevel Protractors   Bore Gauges

Precision Magnetic Tools
Magnetic Stands  Magnetic Vee Blocks  Magnetic Vices  Steel Vee Blocks  Inspection Steel Parallels  Surface Gauges  Magnetic Holders 

Hand Tools
Torque Wrenches   Nylon Hammers   Nylon Mallets   Rawhide Hammers   Rawhide Mallets   Rubber Hammers   Rubber Mallets   Plastic Hammers   Plastic Mallets   Lead Mallets   Copper Hammers   

 

 

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The total technical specifications and images belongs to lensel optics in  the optical instruments category.