Optical apparatus and image pickup system including the same

Abstract

An optical apparatus includes: a plurality of lens portions that forms respective images of an object; a plurality of filters disposed on respective optical axes of the plurality of lens portions; and a holding member holding the plurality of lens portions and the plurality of filters, in which the plurality of filters includes a first filter and a second filter mutually different in transmission characteristic, and in which the holding member includes a first mount portion and is detachably mountable to an imaging apparatus via the first mount portion.

What is claimed is: 
     
         1 . An optical apparatus comprising:
 a plurality of lens portions configured to form respective images of an object;   a plurality of filters disposed on respective optical axes of the plurality of lens portions; and   a holding member holding the plurality of lens portions and the plurality of filters,   wherein the plurality of filters includes a first filter and a second filter mutually different in transmission characteristic, and   wherein the holding member includes a first mount portion and is detachably mountable to an imaging apparatus via the first mount portion.   
     
     
         2 . The optical apparatus according to  claim 1 , wherein the first mount portion includes an electrical contact for electrical connection with the imaging apparatus. 
     
     
         3 . The optical apparatus according to  claim 1 , further comprising:
 a communication unit configured to transmit information regarding the plurality of lens portions and the plurality of filters to the imaging apparatus.   
     
     
         4 . The optical apparatus according to  claim 1 , wherein the first filter outputs light at a first wavelength, and the second filter outputs light at a second wavelength. 
     
     
         5 . The optical apparatus according to  claim 1 , wherein the first filter outputs light in a first polarization state, and the second filter outputs light in a second polarization state. 
     
     
         6 . The optical apparatus according to  claim 1 , wherein the plurality of filters is mutually different in transmission characteristic. 
     
     
         7 . The optical apparatus according to  claim 1 , wherein the plurality of filters includes two or more filters mutually identical in transmission characteristic. 
     
     
         8 . The optical apparatus according to  claim 1 , wherein the holding member includes a second mount portion and is detachably mountable to an accessory apparatus via the second mount portion. 
     
     
         9 . The optical apparatus according to  claim 8 , wherein the second mount portion includes an electrical contact for electrical connection with the accessory apparatus. 
     
     
         10 . The optical apparatus according to  claim 8 , wherein the accessory apparatus is detachably mountable to the imaging apparatus. 
     
     
         11 . The optical apparatus according to  claim 8 , wherein the accessory apparatus includes an optical system that is common to the plurality of lens portions and guides light from the object into the plurality of lens portions. 
     
     
         12 . The optical apparatus according to  claim 11 , wherein the optical system converts the light from the object into parallel light. 
     
     
         13 . The optical apparatus according to  claim 11 , wherein the optical system forms an intermediate image of the object. 
     
     
         14 . The optical apparatus according to  claim 13 , wherein the accessory apparatus includes a field stop disposed at a position of the intermediate image of the object. 
     
     
         15 . The optical apparatus according to  claim 14 , wherein a diffusing element is provided at an aperture portion of the field stop. 
     
     
         16 . The optical apparatus according to  claim 1 , wherein the plurality of lens portions includes a lens portion movable in an optical-axis direction. 
     
     
         17 . The optical apparatus according to  claim 1 , wherein the plurality of lens portions includes two or more lens portions mutually different in effective diameter. 
     
     
         18 . An image pickup system comprising:
 the optical apparatus according to  claim 1 ; and   the imaging apparatus on which the optical apparatus is mounted.   
     
     
         19 . The image pickup system according to  claim 18 , further comprising:
 a processing unit configured to process image information acquired by the imaging apparatus, based on information regarding the plurality of lens portions and the plurality of filters.   
     
     
         20 . An optical apparatus comprising:
 a plurality of lens portions configured to form respective images of an object;   a plurality of filters disposed on respective optical axes of the plurality of lens portions;   a holding member holding the plurality of lens portions and the plurality of filters; and   a communication unit configured to transmit information regarding the plurality of lens portions and the plurality of filters to an imaging apparatus,   wherein the plurality of filters includes a first filter and a second filter mutually different in transmission characteristic.