TCD2712DG toshiba linear ccd TCD2715DG ccd linear TCD2717BFG electronic image sensor TCD1711DG toshiba toshiba linear image sensor cmos linear image sensors electronic sensor Toshiba image sensor linear sensor cmos image sensor types of image sensors cmos sensor TCD1209DG ccd image sensors TCD2564DG linear image sensor TCD2565BFG linear ccd sensor TCD2566BFG ccd linear image sensor TCD1706DG toshiba ccd TCD1103GFG TCD2711DG toshiba sensor