Order this information in Print

Order this information on CD-ROM

Download in PDF Format

     

Click here to make tpub.com your Home Page

Page Title: Figure 9-1. Deviation of Light Rays Through a Converging Lens
Back | Up | Next

Click here for a printable version

Google


Web
www.tpub.com

Home


   
Information Categories
.... Administration
Advancement
Aerographer
Automotive
Aviation
Combat
Construction
Diving
Draftsman
Engineering
Electronics
Food and Cooking
Math
Medical
Music
Nuclear Fundamentals
Photography
Religion
USMC
   
Products
  Educational CD-ROM's
Printed Manuals
Downloadable Books
   

 

TM 9-254 9-1. Optical Terms - Continued Figure 9-1.  Deviation of Light Rays Through a Converging Lens Figure 9-2.  Deviation of Light Rays Through a Diverging Lens g. Field-of-View.  The true field-of-view of any optical instrument is the extent (the width and height) of what can be seen at one time by looking through the instrument. h. Focal Length.  The distance from the focal point back to the surface of a mirror or optical center of a lens, as shown in figure 9-1. i. Focal Point.  The point at which rays of light converge when they pass through a lens, as shown in figure 9-1. j. Focus.  To adjust the eyepiece of a telescope, so that the image is clearly seen by the eye. k. Newton’s Rings.  When positive (convergent) lens and negative (divergent) lens of slightly unequal curvature are pressed one against the other, irregular bands or patches of color appear between the surfaces of the two lenses, as shown in figure 9-3. l. Parallax.  Optically, parallax in a telescope with a reticle is any apparent movement of the reticle in relation to distant objects in the field-of-view observed by movement of the observer’s head.  This condition exists when the image in the telescope lies in one focal plane and the reticle lies in another. Change 2  9-2

Privacy Statement - Press Release - Copyright Information. - Contact Us - Support Integrated Publishing

Integrated Publishing, Inc. - A (SDVOSB) Service Disabled Veteran Owned Small Business