Portable lensmeter
Portable lensmeters and portable lensmeter modules are disclosed. In one embodiment, a portable lensmeter module comprises a housing having an aperture formed therethrough and having a first slot formed therein for receiving and reversibly coupling to a lens; a light source disposed within the housing; and a microlens array disposed within the housing. The lens and the microlens array define an optical channel from the light source to the aperture when the lens is coupled to the housing; and a light detector of a mobile device is positioned adjacent to the aperture and at a focal point of the microlens array when the lensmeter module is mechanically coupled to the mobile device.
1. A lensmeter for measuring a lens of a pair of prescription glasses, the lensmeter comprising:
a housing having a slot formed therein for receiving and reversibly coupling to the lens;
a light source disposed within the housing;
a microlens array disposed within the housing, wherein the lens and the microlens array define an optical channel from the light source to the lens when the lens is coupled to the housing; and
a light detector disposed within the housing, wherein the light detector is positioned at a focal point of the microlens array such that a spot pattern is projected onto the light detector when light generated by the light source passes through the optical channel.
2. The lensmeter of claim 1 , further comprising:
a processing device operatively coupled to the light source and the light detector, wherein the processing device is configured to:
activate the light source;
receive image data captured by the light detector while the light source is activated; and
store the image data in a memory.
3. The lensmeter of claim 2 , wherein the processing device is further configured to:
cause the image data stored in the memory to be transmitted to a mobile device.
4. The lensmeter claim 2 , wherein the processing device is configured to determine a prescription of the lens by comparing the image data to image data representative of a spot array generated for a lens having a known prescription.
5. The lensmeter of claim 1 , wherein the light source comprises a laser source.
6. The lensmeter of claim 1 , further comprising a battery port disposed within the housing, wherein the battery port is configured to electrically connect the battery to the light source when a battery is coupled to the battery port.