Hyperspectral and reciprocal lighting DISCOVER MORE @ Enhanced Imaging, Enhanced Lighting 1 www.cvrlighting.com
Hyperspectral imaging Hyperspectral imaging is basically colour CONTENTS imaging, but without being restricted to 1. Hyperspectral imaging 2. Hyperspectral lighting the visible part of the spectrum or to a 3. Lighting specifics three channel system. 4. Matrix – wavelength ranges 5. Matrix – spectral definition 6. Matrix – lighting unit / sensor matching Hyperspectral imaging provides a new data 7. Matrix – spatial / spectral uniformity 8. Matrix – spatial / spectral contrast dimension, additional to spatial, 9. Matrix – control sensitivity geometrical, quantitative and other 10. Matrix – calibration dimensions, in which a discriminant can be found. DISCOVER MORE @ Enhanced Imaging, Enhanced Lighting 2 www.cvrlighting.com
Hyperspectral lighting There are multiple hyperspectral imaging CONTENTS solutions. Each operate across a specific 1. Hyperspectral imaging range of wavelength. 2. Hyperspectral lighting 3. Lighting specifics Broad lighting, such as natural sun light, or 4. Matrix – wavelength ranges halogen light, can be used as light sources. 5. Matrix – spectral definition 6. Matrix – lighting unit / sensor matching 7. Matrix – spatial / spectral uniformity 8. Matrix – spatial / spectral contrast 9. Matrix – control sensitivity 10. Matrix – calibration These light sources are however difficult to adapt to the specific sensitivities and ranges of the hyperspectral sensors. DISCOVER MORE @ Enhanced Imaging, Enhanced Lighting 3 www.cvrlighting.com
Matrix Lighting specifics Wavelength ranges CONTENTS 1. Hyperspectral imaging Spectral definition 2. Hyperspectral lighting 3. Lighting specifics 4. Matrix – wavelength ranges Lighting unit / sensor matching 5. Matrix – spectral definition 6. Matrix – lighting unit / sensor matching 7. Matrix – spatial / spectral uniformity Spatial / spectral uniformity 8. Matrix – spatial / spectral contrast 9. Matrix – control sensitivity 10. Matrix – calibration Spatial / spectral contrast Control sensitivity Calibration DISCOVER MORE @ Enhanced Imaging, Enhanced Lighting 4 www.cvrlighting.com
Wavelength ranges For hyperspectral imaging the lighting unit CONTENTS is matching the range of sensitivity of the 1. Hyperspectral imaging sensor. We currently offer luminaires in the 2. Hyperspectral lighting 3. Lighting specifics visible, the near IR, and a combination of 4. Matrix – wavelength ranges both. 5. Matrix – spectral definition 6. Matrix – lighting unit / sensor matching 7. Matrix – spatial / spectral uniformity 8. Matrix – spatial / spectral contrast 9. Matrix – control sensitivity 10. Matrix – calibration DISCOVER MORE @ Enhanced Imaging, Enhanced Lighting 5 www.cvrlighting.com
Spectral definition Wide spectrum ranges are achieved with a CONTENTS mix of narrow emitting LEDs and wide 1. Hyperspectral imaging emitting LEDs. CVRL’s 16 channel Matrix 2. Hyperspectral lighting 3. Lighting specifics has 15 narrow emitting LEDs and 1 broad 4. Matrix – wavelength ranges emitting LED. 5. Matrix – spectral definition 6. Matrix – lighting unit / sensor matching 7. Matrix – spatial / spectral uniformity 8. Matrix – spatial / spectral contrast 9. Matrix – control sensitivity 10. Matrix – calibration DISCOVER MORE @ Enhanced Imaging, Enhanced Lighting 6 www.cvrlighting.com
Lighting / Sensor The modulation of CONTENTS each channel gives the 1. Hyperspectral imaging user the opportunity to 2. Hyperspectral lighting 3. Lighting specifics inversely match the 4. Matrix – wavelength ranges sensor response curve. 5. Matrix – spectral definition 6. Matrix – lighting unit / sensor matching Where responsive, a 7. Matrix – spatial / spectral uniformity small amount of light is 8. Matrix – spatial / spectral contrast 9. Matrix – control sensitivity emitted. Where 10. Matrix – calibration insensitive, a large amount of light is emitted. DISCOVER MORE @ Enhanced Imaging, Enhanced Lighting 7 www.cvrlighting.com
Spatial spectral uniformity CONTENTS 1. Hyperspectral imaging 2. Hyperspectral lighting The modulation of the spectrum ensures 3. Lighting specifics 4. Matrix – wavelength ranges that the emitted light of an hyperspectral 5. Matrix – spectral definition lighting unit is uniform when imaged by a 6. Matrix – lighting unit / sensor matching 7. Matrix – spatial / spectral uniformity hyperspectral camera. The architecture, 8. Matrix – spatial / spectral contrast and in particular the optical elements of 9. Matrix – control sensitivity 10. Matrix – calibration the light must ensure that this is true across the entire field of view. DISCOVER MORE @ Enhanced Imaging, Enhanced Lighting 8 www.cvrlighting.com
Spatial spectral uniformity Area lighting CONTENTS Courtesy of IMEC 1. Hyperspectral imaging 2. Hyperspectral lighting 3. Lighting specifics 4. Matrix – wavelength ranges 5. Matrix – spectral definition 6. Matrix – lighting unit / sensor matching 7. Matrix – spatial / spectral uniformity 8. Matrix – spatial / spectral contrast 9. Matrix – control sensitivity 10. Matrix – calibration DISCOVER MORE @ Enhanced Imaging, Enhanced Lighting 9 www.cvrlighting.com
Spatial spectral uniformity Linear lighting CONTENTS 1. Hyperspectral imaging 2. Hyperspectral lighting 3. Lighting specifics 4. Matrix – wavelength ranges 5. Matrix – spectral definition 6. Matrix – lighting unit / sensor matching 7. Matrix – spatial / spectral uniformity 8. Matrix – spatial / spectral contrast 9. Matrix – control sensitivity 10. Matrix – calibration DISCOVER MORE @ Enhanced Imaging, Enhanced Lighting 10 www.cvrlighting.com
Spatial spectral contrast An uneven spatial spectral uniformity can CONTENTS have benefits. It allows for example for 1. Hyperspectral imaging 2. Hyperspectral lighting simultaneous capture of contrasted images 3. Lighting specifics from various directions. 4. Matrix – wavelength ranges 5. Matrix – spectral definition 6. Matrix – lighting unit / sensor matching 7. Matrix – spatial / spectral uniformity 8. Matrix – spatial / spectral contrast 9. Matrix – control sensitivity 10. Matrix – calibration DISCOVER MORE @ Enhanced Imaging, Enhanced Lighting 11 www.cvrlighting.com
Control sensitivity 12 bits control system (4096 levels) per CONTENTS channel. Current control. 1. Hyperspectral imaging 2. Hyperspectral lighting 3. Lighting specifics 4. Matrix – wavelength ranges 5. Matrix – spectral definition 6. Matrix – lighting unit / sensor matching 7. Matrix – spatial / spectral uniformity 8. Matrix – spatial / spectral contrast 9. Matrix – control sensitivity 10. Matrix – calibration DISCOVER MORE @ Enhanced Imaging, Enhanced Lighting 12 www.cvrlighting.com
Calibration With between 1 and 16 channels, all CONTENTS controlled with a 12 bit control range 1. Hyperspectral imaging 2. Hyperspectral lighting between no and full power, calibration is 3. Lighting specifics crucial. Each unit comes with 20 pre- 4. Matrix – wavelength ranges 5. Matrix – spectral definition programmed profiles, some of which can be 6. Matrix – lighting unit / sensor matching requested. 7. Matrix – spatial / spectral uniformity 8. Matrix – spatial / spectral contrast However, the only proper calibration is in situ, 9. Matrix – control sensitivity with a full system calibration, taking into 10. Matrix – calibration consideration the whole imaging/lighting system. CVRL offers its services for the development of in situ calibration procedures. DISCOVER MORE @ Enhanced Imaging, Enhanced Lighting 13 www.cvrlighting.com
Reciprocal imaging There are some drawbacks to hyper spectral CONTENTS imaging: lower resolution, longer acquisition 1. Hyperspectral imaging time, etc. 2. Hyperspectral lighting 3. Lighting specifics 4. Matrix – wavelength ranges One option, especially in linear systems, is 5. Matrix – spectral definition 6. Matrix – lighting unit / sensor matching reciprocal lighting. It basically is the reduction 7. Matrix – spatial / spectral uniformity 8. Matrix – spatial / spectral contrast of the data space to its most significant 9. Matrix – control sensitivity variables. In other word, it is the use of 10. Matrix – calibration 11. Reciprocal imaging monochrome cameras with selective lighting. DISCOVER MORE @ Enhanced Imaging, Enhanced Lighting 14 www.cvrlighting.com
Thank You www.epi-light.com CVR Lighting Ltd, Hoffmann Park, Inchera, Little Island, Cork, Ireland www.cvrlighting.com – sales@cvrlighting.com - +353 21 4510232 Germany +49 172 3652253
Recommend
More recommend
