Abstract: An illumination apparatus used by connecting an illumination head to a power source device, capable of supplying a rated current to individual light emitting devices of the illumination head by using a power source device of an identical rating irrespective of the specification of the illumination head, wherein the illumination head has a current detection resistor for detecting current flowing through the power supply circuit, and the resistance value of the resistor is selected so as to cause a voltage drop equal with a predetermined reference potential when a rated current is supplied to each of the light emitting devices, and the power source device is provided with a current controller for controlling the supplied current such that the potential for the voltage drop caused by the current detection resistor is equal with the reference potential.

Abstract: A flexible wiring substrate forms a light emitting device array attached to a frustoconical inner circumferential surface that serves as a light emitting device arranging surface of an annual oblique light illumination apparatus. A plurality of arcuate zonal wiring patterns for mounting light emitting devices are provided. Each wiring pattern is in the form of a developed frustoconical shape. The wiring patterns are serpiginously provided continuously directly or by way of connecting wiring patterns to a base film of a predetermined shape.

Abstract: An annular oblique light illumination apparatus manufactured by using a flexible wiring substrate in which a plurality of arcuate zonal wiring patterns each in the form of a developed frustconical shape as a light emitting device arranging surface when cut along the pattern are serpiginously formed continuously to a base film of a predetermined shape, by setting and soldering light emitting devices to the arcuate zonal wiring patterns, cutting out the arcuate zonal wiring patterns to form light emitting device arrays and fixing the same to the arranging surface, whereby the wiring substrate can be supported reliably without using any special jig conforming the arcuate shape of the wiring patterns for mounting the light emitting devices, thereby improving the soldering operation efficiency, saving the troubles of exchange and handling of jigs and further, avoiding slackening or distortion of the wiring substrate even in a case of applying soldering by a flow soldering apparatus.

Abstract: An annular oblique light illumination apparatus manufactured by using a flexible wiring substrate in which a plurality of arcuate zonal wiring patterns each in the form of a developed frustconical shape as a light emitting device arranging surface when cut along the pattern are serpiginously formed continuously to a base film of a predetermined shape, by setting and soldering light emitting devices to the arcuate zonal wiring patterns, cutting out the arcuate zonal wiring patterns to form light emitting device arrays and fixing the same to the arranging surface, whereby the wiring substrate can be supported reliably without using any special jig conforming the arcuate shape of the wiring patterns for mounting the light emitting devices, thereby improving the soldering operation efficiency, saving the troubles of exchange and handling of jigs and further, avoiding slackening or distortion of the wiring substrate even in a case of applying soldering by a flow soldering apparatus.

Abstract: An illumination apparatus used by connecting an illumination head to a power source device, capable of supplying a rated current to individual light emitting devices of the illumination head by using a power source device of an identical rating irrespective of the specification of the illumination head, wherein the illumination head has a current detection resistor for detecting current flowing through the power supply circuit, and the resistance value of the resistor is selected so as to cause a voltage drop equal with a predetermined reference potential when a rated current is supplied to each of the light emitting devices, and the power source device is provided with a current controller for controlling the supplied current such that the potential for the voltage drop caused by the current detection resistor is equal with the reference potential.