Abstract

If two thin lens elements of two different glasses are combined into a thin two-element system, then the chromatic properties of the system may be described by the effective values of <i>V</i> [<i>V</i> = (<i>N</i> - 1)/(<i>N</i><sub><i>F</i></sub>-<i>N</i><sub><i>C</i></sub>)], and <i>P</i> [<i>P</i>=(Δ<i>N</i>/<i>N</i><sub><i>F</i></sub>-<i>N</i><sub><i>C</i></sub>)]. The effective value, <i>P¯</i>, is a linear function of <i>V¯</i>. On a graph of <i>P</i> versus <i>V</i>, the straight line drawn through the points for two glasses is the locus of all possible effective values of <i>V</i> and <i>P</i> for combinations of these two glasses. By means of such a graph the effective value <i>P¯</i> for a combination of two glasses may be matched to <i>P</i> of a third glass whose <i>V</i> differs from <i>V¯</i> by a useful amount. An achromatic lens system of the three glasses may then be computed, which will have a common focal length for three wavelengths.

PDF Article

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription