Patent ID: 7484851
Filing Date: 2009-02-03
Classification: G03B

Abstract:
1. An image forming device for forming an image on an image forming object by irradiating said image forming object with a luminous flux corresponding to said image, said image forming device comprising: a lens configured to irradiate said image forming object with said luminous flux, the lens having a zoom lens that changes a zoom magnification by changing a position of the zoom lens and a focus lens that changes a focus magnification by changing a position of the focus lens; a driving system configured to drive each of said zoom lens and said focus lens; a position sensor configured to detect respective positions of said zoom lens and said focus lens; a controlling circuit configured to make said respective positions detected by said position sensor coincide with respective target values by receiving a predetermined command and controlling said driving system; and a memory in which information can be recorded; wherein when said controlling circuit receives a first command to move at least one of said zoom lens and said focus lens, said controlling circuit sets said target values on a basis of the first command, controls said driving system using the set target values, and performs control to record said respective positions detected by said position sensor in timing of ending the controlling of said driving system in said memory as a first adjustment value, and when said controlling circuit receives a second command to read contents of said memory, said controlling circuit reads said first adjustment value from said memory, and controls said driving system using said first adjustment value as said target values.