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hardware:objectives [2023/08/09 17:18]
Jon Daniels [Mechanical Angle] added Nikon 60x/1.0 W 		hardware:objectives [2024/11/01 22:02] (current)
Jon Daniels [Mechanical Angle]
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 ASI and Special Optics have co-developed two [[http://asiimaging.com/docs/cleared_tissue_objective|multi-immersion objectives]] designed originally for cleared tissue (but useful in any media) suitable for the diSPIM geometry.  The 54-10-12 with nominal NA 0.4 can image cleared tissue up to 5 mm deep in slab form or within a 12 mm spherical envelope, and the 54-12-8 with nominal NA 0.7 can go 2 mm deep or 10 mm spherical envelope. ASI and Special Optics have co-developed two [[http://asiimaging.com/docs/cleared_tissue_objective|multi-immersion objectives]] designed originally for cleared tissue (but useful in any media) suitable for the diSPIM geometry.  The 54-10-12 with nominal NA 0.4 can image cleared tissue up to 5 mm deep in slab form or within a 12 mm spherical envelope, and the 54-12-8 with nominal NA 0.7 can go 2 mm deep or 10 mm spherical envelope.
  
-Single-sided systems (iSPIM) have much more flexibility because the illumination objective can be a low-NA long-WD objective. A popular pair for high-resolution imaging is the same objective pair as used on the lattice light sheet, specifically the Nikon 25x/1.1 objective paired with Special Optics 54-10-7 which is 28.6x/0.66.+Single-sided systems (iSPIM) have much more flexibility because the illumination objective can be a low-NA long-WD objective. A popular pair for high-resolution imaging is the same objective pair as used on the lattice light sheet, specifically the Nikon 25x/1.1 objective paired with either the Special Optics 54-10-7 which is 28.6x/0.66, or else paired with the Thorlabs 20x/0.6.
  
 ==== Close-up Drawings ==== ==== Close-up Drawings ====
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 ==== Magnification ==== ==== Magnification ====
  
-Like all infinity microscopes, the magnification is given by the ratio of the effective focal lengths of tube lens and objective.  The captured fField of view is just camera sensor size divided by magnification.  The sensor size is readily available.  The most common sCMOS cameras have 6.5um square pixels and 2048x2048 pixels, but there are a wide variety of cameras.  Some cameras have 11um pixels which usually require increasing magnification in order to sample sufficiently for diffraction-limited resolution.+Like all infinity microscopes, the magnification is given by the ratio of the effective focal lengths of tube lens and objective.  The captured field of view is just camera sensor size divided by magnification.  The sensor size is readily available.  The most common sCMOS cameras have 6.5um square pixels and 2048x2048 pixels, but there are a wide variety of cameras.  Some cameras have 11um pixels which usually require increasing magnification in order to sample sufficiently for diffraction-limited resolution.
  
 By default ASI uses 200 mm focal length tube lenses (Nikon glass) but a offers a [[http://asiimaging.com/docs/mim_ramm_vts#mim_tube_lenses_and_assemblies|variety of tube lenses]] so the magnification can easily be chosen.  Typical reasons to adjust the magnification include to adequately sample on the camera (for sensors with larger pixels or using low-mag high-NA objectives) or to increase the field of view.  When decreasing magnification, beware of the objective's intrinsic field of view (usually specified by field number, of vignetting (see http://asiimaging.com/docs/mim_ramm_vts#infinity_space_limitations), and ensure that the spatial sampling on the camera is sufficient (see https://asiimaging.com/docs/infinity_microscope_basics#spatial_sampling). By default ASI uses 200 mm focal length tube lenses (Nikon glass) but a offers a [[http://asiimaging.com/docs/mim_ramm_vts#mim_tube_lenses_and_assemblies|variety of tube lenses]] so the magnification can easily be chosen.  Typical reasons to adjust the magnification include to adequately sample on the camera (for sensors with larger pixels or using low-mag high-NA objectives) or to increase the field of view.  When decreasing magnification, beware of the objective's intrinsic field of view (usually specified by field number, of vignetting (see http://asiimaging.com/docs/mim_ramm_vts#infinity_space_limitations), and ensure that the spatial sampling on the camera is sufficient (see https://asiimaging.com/docs/infinity_microscope_basics#spatial_sampling).
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 | Olympus 20x/0.5 W       |  22°                |  45°              | fits better than expected (WD is probably a bit more than spec)  | | Olympus 20x/0.5 W       |  22°                |  45°              | fits better than expected (WD is probably a bit more than spec)  |
 | Olympus 20x/1.0 W       |  49°                |  52°              |   | | Olympus 20x/1.0 W       |  49°                |  52°              |   |
 +| Nikon 20x/1.0 W         |  49°                |  53°              |                                           |
 +| Leica 20x/1.0 W         |  49°                |  52°              |                                           |
 +| Zeiss 20x/1.0 W         |  49°                |  51°              | 421452-9800-00                            |
 | Nikon 25x/1.1 W         |  56°                |  58°              | usual lattice detection                                          | | Nikon 25x/1.1 W         |  56°                |  58°              | usual lattice detection                                          |
 | Olympus 60x/1.0 W       |  49°                |  53°              | sometimes oSPIM detection           | | Olympus 60x/1.0 W       |  49°                |  53°              | sometimes oSPIM detection           |
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 | Nikon 60x/1.0 W         |  49°                |  57°              |            | | Nikon 60x/1.0 W         |  49°                |  57°              |            |
 | SO 54-10-7 29x/0.66 W   |  30°                |  30°              | traditional lattice illumination                                 | | SO 54-10-7 29x/0.66 W   |  30°                |  30°              | traditional lattice illumination                                 |
-| TL20X-MPL 20x/0.6 W     |  27°                |  ~30°             | new (2020) cost-effective lattice illumination                   |+| TL20X-MPL 20x/0.6 W     |  27°                |  ~30°             | new (2020) cost-effective lattice illumination, note only 7mm FN at full NA    |
 | Nikon 20x/1.0 glyc      |  43°                |  ~54°             | cleared tissue confocal used in light sheet (RI 1.44 - 1.50)     | | Nikon 20x/1.0 glyc      |  43°                |  ~54°             | cleared tissue confocal used in light sheet (RI 1.44 - 1.50)     |
 | Olympus 25x/1.0 glyc    |  43°                |  56°              | cleared tissue confocal used in light sheet (RI 1.41 - 1.52)     | | Olympus 25x/1.0 glyc    |  43°                |  56°              | cleared tissue confocal used in light sheet (RI 1.41 - 1.52)     |
-| SO 54-10-12 17x/0.4 MI  |  16°                |  22°              | ASI multi-immersion #1 (RI 1.33 - 1.56, nominal 1.45)            | +| SO 54-10-12 17x/0.4 MI  |  16°                |  32°              | ASI multi-immersion #1 (RI 1.33 - 1.56, nominal 1.45), mechanical limitation in body   | 
-| SO 54-12-8 24x/0.7 MI   |  29°                |  36°              | ASI multi-immersion #2 (RI 1.33 - 1.56, nominal 1.45)            |+| SO 54-12-8 24x/0.7 MI   |  29°                |  36°              | ASI multi-immersion #2 (RI 1.33 - 1.56, nominal 1.45)   | 
 +| SO 57-12-19 10x/0.3 MI  |  11°                |  28°              | ASI multi-immersion #3 (RI 1.33 - 1.56, nominal 1.45), mechanical limitation in body  |
 | SO 54-9-4 52x/1.15 MI   |  52°                |  57°              | (preliminary) ASI multi-immersion #3 (RI 1.33 - 1.56, nominal 1.45)            | | SO 54-9-4 52x/1.15 MI   |  52°                |  57°              | (preliminary) ASI multi-immersion #3 (RI 1.33 - 1.56, nominal 1.45)            |
 +
 +
 +==== Working Distance and Imaging Depth ====
 +
 +The imaging depth of a pair of co-focused objectives into a flat pancake-like sample without hitting the top of the sample is proportional to the residual mechanical angle that the two objectives leave and also proportional to their working distance, with minor factor related to the relative mechanical angle/overall rotation.  There may also be second-order mechanical effects and such combinations should be modeled.  ASI has drawings of many different objective pairs and can prepare others.  Please inquire.
  
  

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