Difference between revisions of "Focus (of a fixed lens)"
Jump to navigation
Jump to search
m (1 revision) |
|||
| (5 intermediate revisions by one other user not shown) | |||
| Line 1: | Line 1: | ||
'''2-2-105 | '''2-2-105 | ||
| Line 7: | Line 6: | ||
Note: The term "focus" in its more general and correct sense is given in 2-1-125. | Note: The term "focus" in its more general and correct sense is given in 2-1-125. | ||
[[Image: | [[Image:Ch2_Fig16b.jpg|400px|border]] | ||
[[Image:Ch2_Fig18.jpg|400px]] | [[Image:Ch2_Fig18.jpg|400px|border]] | ||
| Line 15: | Line 14: | ||
{{languages|Focus (of a fixed lens)}} | {{languages|Focus (of a fixed lens)}} | ||
[[Category:2.2 Optical Apparatus] | [[Category:2.2 Optical Apparatus]] | ||
[[Category:Alphabetical Index]] | [[Category:Alphabetical Index]] | ||
[[Category:IALA Dictionary 1970-89 Edition]] | [[Category:IALA Dictionary 1970-89 Edition]] | ||
[[Category:IALA Dictionary 2023 Revision]] | |||
Latest revision as of 02:58, 3 February 2024
2-2-105
The point of intersection of the axis of the lens (2-2-115) and the median horizontal plane through the belt. A ray of light emitted by a point source situated at this point is re-directed by an element of the lens into a direction normal to the axis of the lens. (Figs. 16b and 18)
Note: The term "focus" in its more general and correct sense is given in 2-1-125.
Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)
