LIGHT EMITTING DEVICE; AND MEDICAL SYSTEM, ELECTRONIC APPARATUS, AND INSPECTION METHOD USING SAME

• Main Authors: OSHIO, Shozo, ABE, Takeshi, NITTA, Mitsuru
• Format: Patent
• Language: English; French; German
• Published: 11.10.2023
• Subjects: ADHESIVES; BASIC ELECTRIC ELEMENTS; CHEMISTRY; DEVICES USING STIMULATED EMISSION; DIAGNOSIS; DYES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; HUMAN NECESSITIES; HYGIENE; IDENTIFICATION; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; MEDICAL OR VETERINARY SCIENCE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PAINTS; PHYSICS; POLISHES; SEMICONDUCTOR DEVICES; SURGERY

A light emitting device (10) includes a light source (5) configured to emit a primary light (6), a first phosphor (2) that absorbs the primary light (6) and converts the primary light (6) into a first wavelength-converted light (7) having a wavelength longer than that of the primary light (6), and a second phosphor (3) that absorbs the primary light (6) and converts the primary light (6) into a second wavelength-converted light (8) having a wavelength longer than that of the primary light (6). The first wavelength-converted light (7) is a fluorescence having a light component over an entire wavelength range of 700 nm or more to 800 nm or less. The second wavelength-converted light (8) is a fluorescence having a peak where a fluorescence intensity shows a maximum value in a wavelength range of 380 nm or more to less than 700 nm. The first wavelength-converted light (7) has a 1/10 afterglow time longer than that of the second wavelength-converted light (8).