ILLUMINATION DEVICE

An Illumination device is disclosed, comprising a plurality of light emitting devices (1, 101, 111) and an optical system (15,105,115) for collimating light emitted by the plurality of light emitting devices (1,101,111), wherein each of the light emitting devices comprises an LED light source device (1,101,111) having:an LED chip (2) for emitting excitation light,a phosphor body (6) covering the LED chip (2) for converting excitation light into illumination light of a predetermined colour temperature, anda light blocking layer (7) arranged on the lateral surfaces of the LED chip and/or the phosphor body (6),wherein a first group of the light emitting devices (101) are arranged in a first array (102) having first gaps (103), and a first optical system (105) is arranged near the first group of light emitting devices (101), an optical axis (106) of the first optical system (105) being substantially orthogonal to the first array (102), andwherein at least one second group of the light emitting devices (102) are arranged in at least one second array (112) parallel to the first array (102), having second gaps (113), at least one second optical system (115) is arranged near the at least one second group of light emitting devices (111), an optical axis (116) of the second optical system (115) being substantially orthogonal to the second array (112), andthe first and at least one second optical systems (105, 115) are arranged so that, in a predetermined distance from the illumination device, light emitted by the first group of light emitting devices (101), collimated by the first optical system (105), and light emitted by the at least one second group of light emitting devices (111), collimated by the at least one second optical system (115), superimpose to form a substantially gap-free illumination field.