A unique identifier detection system, comprising: a first object comprising a first object housing; a first invisible light source coupled to the first object housing and configured to emit first invisible light, wherein the first invisible light has a wavelength of less than 380 nm or greater than 750 nm; a first opaque substrate coupled to the first object housing, the first opaque substrate comprising material opaque to invisible light emitted by the first invisible light source, the first opaque substrate defining a first aperture pattern configured to receive the first invisible light from the first invisible light source and to form a first identification pattern, wherein the first aperture pattern comprises a first one or more apertures defined by the first opaque substrate; a second object comprising a second object housing; a second invisible light source coupled to the second object housing and configured to emit second invisible light, wherein the second invisible light has a wavelength of less than 380 nm or greater than 750 nm; a second opaque substrate coupled to the second object housing, the second opaque substrate comprising material opaque to invisible light emitted by the second invisible light source, the second opaque substrate defining a second aperture pattern configured to receive the second invisible light from the second invisible light source and to form a second identification pattern distinct from the first identification pattern, wherein the second aperture pattern comprises a second one or more apertures defined by the second opaque substrate; a device comprising a device housing; an invisible light sensor coupled to the device housing and configured to sense the first invisible light and to sense the second invisible light; and a device control circuit coupled to the device housing and electronically coupled to the invisible light sensor, the device control circuit configured to detect the first identification pattern of the first invisible light and to determine a first object unique identifier based on the first identification pattern, and being configured to detect the second identification pattern of the second invisible light and to determine a second object unique identifier based on the second identification pattern. a first object comprising a first object housing; a first invisible light source coupled to the first object housing and configured to emit first invisible light, wherein the first invisible light has a wavelength of less than 380 nm or greater than 750 nm; a first opaque substrate coupled to the first object housing, the first opaque substrate comprising material opaque to invisible light emitted by the first invisible light source, the first opaque substrate defining a first aperture pattern configured to receive the first invisible light from the first invisible light source and to form a first identification pattern, wherein the first aperture pattern comprises a first one or more apertures defined by the first opaque substrate; a second object comprising a second object housing; a second invisible light source coupled to the second object housing and configured to emit second invisible light, wherein the second invisible light has a wavelength of less than 380 nm or greater than 750 nm; a second opaque substrate coupled to the second object housing, the second opaque substrate comprising material opaque to invisible light emitted by the second invisible light source, the second opaque substrate defining a second aperture pattern configured to receive the second invisible light from the second invisible light source and to form a second identification pattern distinct from the first identification pattern, wherein the second aperture pattern comprises a second one or more apertures defined by the second opaque substrate; a device comprising a device housing; an invisible light sensor coupled to the device housing and configured to sense the first invisible light and to sense the second invisible light; and a device control circuit coupled to the device housing and electronically coupled to the invisible light sensor, the device control circuit configured to detect the first identification pattern of the first invisible light and to determine a first object unique identifier based on the first identification pattern, and being configured to detect the second identification pattern of the second invisible light and to determine a second object unique identifier based on the second identification pattern.