公开(公告)号：CA1173663A

公开(公告)日：1984-09-04

申请号：CA394444

申请日：1982-01-19

Applicant: COMMW OF AUSTRALIA

Inventor： SKINNER DAVID R ,  STOKES REX A ,  FREEMAN LEWIS O ,  MCNEILL ALAN R

IPC: G01J3/28 ,  G01J1/36 ,  G01J3/02 ,  G01J3/08 ,  G02B27/14 ,  G01N21/29

Abstract: This invention relates to an optical system which will enable easy use in the field. Known systems either require sample and reference targets to be imaged within the telescope field or do not enable accurate identification of the measuring field in a view finder. The present invention overcomes this problem by providing a system having a first branch and a second branch which receive light from a sample and reference target respectively. A shutter sequentially allows light from the two branches to pass to a mirror having a slit, reflective portions and transparent portions. Light from the first branch passes through these portions to a detecting branch and some light is reflected through a lens to an eye piece. Similarly some light from the second branch passes through the mirror to the eye piece and some light is reflected to the detecting branch. Accordingly the measuring field can be accurately identified by looking through the eye piece whilst at the same time light is directed to the detecting branch for analysis.

公开(公告)号：CA1187717A

公开(公告)日：1985-05-28

申请号：CA455739

申请日：1984-06-04

Applicant: COMMW OF AUSTRALIA

Inventor： SKINNER DAVID R ,  STOKES REX A ,  FREEMAN LEWIS O ,  MCNEILL ALAN R

IPC: G01N21/25

Abstract: This invention relates to an optical system which will enable easy use in the field. Known systems either require sample and reference targets to be imaged within the telescope field or do not enable accurate identification of the measuring field in a view finder. The present invention overcomes this problem by providing a system having a first branch and a second branch which receive light from a sample and reference target respectively. A shutter sequentially allows light from the two branches to pass to a mirror having a slit, reflective portions and transparent portions. Light from the first branch passes through these portions to a detecting branch and some light is reflected through a lens to an eye piece. Similarly some light from the second branch passes through the mirror to the eye piece and some light is reflected to the detecting branch. Accordingly the measuring field can be accurately identified by looking through the eye piece whilst at the same time light is directed to the detecting branch for analysis.