Hand-holdable optical scanner particularly useful as electronic translator

An optical scanner comprising a hand-holdable housing including:

• a scanner head for scanning a record medium;
• a roller engageable and rotated by said record medium when scanned by said scanner head, said roller including an optically-sensible marking for use in measuring the rotary movement of the roller;
• an illuminator for illuminating said record medium and roller including said marking thereon;
• an optical sensor for sensing information on the record medium and said marking on the roller and for producing an output corresponding thereto;
• a first optical system including a focusing lens for focusing light reflected from said record medium onto said optical sensor;
• and
• a second optical system for focusing light reflected from said roller onto said optical sensor,
• said second optical system including said focusing lens of the first optical system;
• said second optical system further including a lens-mirror member having:
• a first face facing said focusing lens for receiving light reflected by said roller;
• a second face facing said optical sensor for transmitting light exiting from said lens-mirror member to said optical sensor;
• and
• a third reflecting face for receiving the incoming light from said first face and for reflecting same through said second face to the optical sensor;
• at least one of the faces being light-converging to partially focus the received light such as to compensate for a shorter distance between the focal lens and the roller than between the focal lens and the record member.