The term optical instrument is identified in base64 scheme by the sequence b3B0aWNhbCBpbnN0cnVtZW50, while the MD5 signature is equal to 037d5660c0b23e3ceac2c84aa8f4d858. The ASCII encoding of optical instrument in hexadecimal notation is 6f70746963616c20696e737472756d656e74.