Optical switch devices

A security device that is achromatic comprising:

• an array of lenses;
• and
• a plurality of first and second segments disposed under the array of lenses, the first segments corresponding to portions of a first icon and a first background, and the second segments corresponding to portions of a second icon and a second background,
• wherein at a first viewing angle, the array of lenses presents for viewing the first icon and the first background without presenting the second icon for viewing, and at a second viewing angle different from the first viewing angle, the array of lenses presents for viewing the second icon and the second background without presenting the first icon for viewing,
• wherein individual ones of the first and second segments comprise specular reflecting features and diffusing features,
• wherein for the first and second segments,
• the specular reflecting features define the first and second icons, and the diffusing features define the first and second backgrounds, or
• the diffusing features define the first and second icons, and the specular reflecting features define the first and second backgrounds,
• wherein upon viewing at an angle in the specular direction,
• the first and second icons appear specularly bright and the first and second backgrounds appear matte white or grey when the specular reflecting features define the first and second icons and the diffusing features define the first and second backgrounds, or
• the first and second icons appear matte white or grey and the first and second backgrounds appear specularly bright when the specular reflecting features define the first and second backgrounds and the diffusing features define the first and second icons,
• wherein upon viewing at an angle not in the specular direction,
• the first and second icons appear dark relative to the first and second backgrounds, and the first and second backgrounds appear matte white or grey when the specular reflecting features define the first and second icons and the diffusing features define the first and second backgrounds, or
• the first and second icons appear matte white or grey, and the first and second backgrounds appear dark relative to the first and second icons when the specular reflecting features define the first and second backgrounds and the diffusing features define the first and second icons.