Microscope Objective Turrets
- Objective Lens Turrets with up to Five Ports
- Mount RMS- or M25 x 0.75-Threaded Objective Lenses
- Connect to Microscope via SM1 Threads or D1T Dovetail
OT1
Objective Lens Turret,
RMS Threads
CSN500
Cerna® Objective Lens Turret,
M25 x 0.75 Threads
CSN510
Cerna® Objective Lens Turret,
RMS Threads
Application Idea
The CSN510 Nosepiece holding five objectives.
Please Wait
Features
- Easily Rotate Objectives in an Imaging System
- Mount Four or Five Objectives at Once
- OT1 Objective Lens Turret Compatible with SM1 Lens Tubes
- Cerna® Objective Lens Turrets Compatible with DIY Cerna Components
Thorlabs offers four-position or five-position microscope objective lens turrets for mounting objective lenses in either horizontal or vertical orientations. The OT1 is a compact objective lens turret that has four RMS (0.800"-36)-threaded ports and an SM1-threaded mounting interface, making it compatible with Thorlabs' lens tubes. Our Cerna objective lens turrets have five mounting ports with either RMS or M25 x 0.75 threads. They have a D1T dovetail mounting interface for compatibility with the CSA1400 mounting arm, sold separately below.
Additionally, we offer a Post-Mountable Focus Block that includes a built-in five-objective turret.
Thorlabs Dovetail Referencea | |||
---|---|---|---|
Type | Shape | Outer Dimension | Angle |
95 mm | Linear | 95 mm | 45° |
D1N | Circular | Ø2.018" | 60° |
D2Nb | Circular | Ø1.50" | 90° |
D2NBb | Circular | Ø1.50" | 90° |
D3N | Circular | Ø45 mm | 70° |
D5N | Circular | Ø1.58" | 90° |
D6N | Circular | Ø1.90" | 90° |
D7N | Circular | Ø2.05" | 90° |
D1T | Circular | Ø1.50" | 60° |
D3T | Circular | Ø1.65" | 90° |
D1Y | Circular | Ø107 mm | 60° |
D2Y | Circular | Ø2.32" | 50° |
D3Y | Circular | Ø1.75" | 90° |
D4Y | Circular | Ø56 mm | 60° |
D5Y | Circular | Ø46 mm | 60° |
D6Y | Circular | Ø41.9 mm | 45° |
D1Z | Circular | Ø54 mm | 60° |
D2Z | Circular | Ø57 mm | 60° |
D3Z | Circular | Ø54 mm | 45° |
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This photo shows the male D1N dovetail on the trinoculars next to the female D1N dovetail on the epi-illumination arm.
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This photo shows the male 95 mm dovetail on the microscope body and the female 95 mm dovetail on the CSA1002 Fixed Arm.
Introduction to Microscope Dovetails
Dovetails are used for mechanical mating and optical port alignment of microscope components. Components are connected by inserting one dovetail into another, then tightening one or more locking setscrews on the female dovetail. Dovetails come in two shapes: linear and circular. Linear dovetails allow the mating components to slide before being locked down, providing flexible positioning options while limiting unneeded degrees of freedom. Circular dovetails align optical ports on different components, maintaining a single optical axis with minimal user intervention.
Thorlabs manufactures many components which use dovetails to mate with our own components or those of other manufacturers. To make it easier to identify dovetail compatibility, we have developed a set of dovetail designations. The naming convention of these designations is used only by Thorlabs and not other microscope manufacturers. The table to the right lists all the dovetails Thorlabs makes, along with their key dimensions.
In the case of Thorlabs’ Cerna® microscopes, different dovetail types are used on different sections of the microscope to ensure that only compatible components can be mated. For example, our WFA2002 Epi-Illuminator Module has a male D1N dovetail that mates with the female D1N dovetail on the microscope body's epi-illumination arm, while the CSS2001 XY Microscopy Stage has a female D1Y dovetail that mates with the male D1Y dovetail on the CSA1051 Mounting Arm.
To learn which dovetail type(s) are on a particular component, consult its mechanical drawing, available by clicking on the red Docs icon () below. For adapters with a female dovetail, the drawing also indicates the size of the hex key needed for the locking setscrew(s). It is important to note that mechanical compatibility does not ensure optical compatibility. Information on optical compatibility is available from Thorlabs' web presentations.
For customers interested in machining their own dovetails, the table to the right gives the outer diameter and angle (as defined by the drawings below) of each Thorlabs dovetail designation. However, the dovetail's height must be determined by the user, and for circular dovetails, the user must also determine the inner diameter and bore diameter. These quantities can vary for dovetails of the same type. One can use the intended mating part to verify compatibility.
In order to reduce wear and simplify connections, dovetails are often machined with chamfers, recesses, and other mechanical features. Some examples of these variations are shown by the drawings below.
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Two examples of how circular male dovetails can be manufactured.
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Two examples of how circular female dovetails can be manufactured.
Standard Mechanical Interfaces on DIY Cerna® Components
The table below gives the dovetail, optical component threads, and cage system interfaces that are present on each DIY Cerna component. If a DIY Cerna component does not have one of the standard interfaces in the table, it is not listed here. Please note that mechanical compatibility does not ensure optical compatibility. Information on optical compatibility is available from Thorlabs' web presentations.
Item # | Microscope Dovetails | Optical Component Threadsa | Cage Systemsb | |||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
95 mm | D1N | D2N | D2NB | D3N | D5N | D1T | D3T | D1Y | D5Y | C-Mountc (1.00"-32) |
SM1d (1.035"-40) |
SM30 (M30.5x0.5) |
SM2e (2.035"-40) |
30 mmd | 60 mme | |
2CM1 | Internal & External | Internal | Yes | |||||||||||||
2CM2 | Internal & External | Internal | Yes | |||||||||||||
BSA2000f | Female | |||||||||||||||
CEA1350 | Male | Female | Yes | |||||||||||||
CEA1400 | Male | Female | Yes | |||||||||||||
CEA1500 | Male | Female | Yes | |||||||||||||
CEA1600 | Male | Female | Yes | |||||||||||||
CFB1500 | Male | |||||||||||||||
CSA1000 | Female | |||||||||||||||
CSA1001 | Female | Internal | Yes | |||||||||||||
CSA1002 | Female | Internal | Yes | |||||||||||||
CSA1003 | Female | Yes | ||||||||||||||
CSA1051 | Female | Male | ||||||||||||||
CSA1200f,g | Yes | |||||||||||||||
CSA1400f | Female | Yes | ||||||||||||||
CSA1500f,h | ||||||||||||||||
CSA2000f | Female | Internal | Yes | |||||||||||||
CSA2001 | Female | External | ||||||||||||||
CSA2100f | Internal | Yes | ||||||||||||||
CSA3000(/M) | Male | |||||||||||||||
CSA3010(/M) | Male | Yes | Yes | |||||||||||||
Item # | 95 mm | D1N | D2N | D2NB | D3N | D5N | D1T | D3T | D1Y | D5Y | C-Mount | SM1 | SM30 | SM2 | 30 mm | 60 mm |
CSC1001 | Male | |||||||||||||||
CSC1002 | Male | |||||||||||||||
CSC1003 | Male | |||||||||||||||
CSC2001 | Male | |||||||||||||||
CSD1001 | Male & Female | Female | ||||||||||||||
CSD1002 | Male & Female | External | ||||||||||||||
CSE2000 | Male & Female | Yes | ||||||||||||||
CSE2100 | Male & Female | Female | Internal | Yes | Yes | |||||||||||
CSE2200 | Male & Female | Female | Internal | Yes | Yes | |||||||||||
CSN100f,i | Yes | |||||||||||||||
CSN200i | Male | |||||||||||||||
CSN210i | Male | |||||||||||||||
CSN500j | Male | |||||||||||||||
CSN510k | Male | |||||||||||||||
CSN1201g,i | ||||||||||||||||
CSN1202g,j | ||||||||||||||||
CSS2001 | Female | |||||||||||||||
LAURE1 | Male | Female | ||||||||||||||
LAURE2 | Male | Female | ||||||||||||||
LCPN1 | Male | Internal | Yes | Yes | ||||||||||||
LCPN2 | Male | Internal | Yes | Yes | ||||||||||||
LCPN3 | Male | Female | Internal | Yes | ||||||||||||
Item # | 95 mm | D1N | D2N | D2NB | D3N | D5N | D1T | D3T | D1Y | D5Y | C-Mount | SM1 | SM30 | SM2 | 30 mm | 60 mm |
OPX2400(/M) | Male & Female | Internal | Yes | |||||||||||||
SM1A58 | Male | Male | Internal | External | Yes | |||||||||||
SM2A56 | Male | External | ||||||||||||||
TC1X | Male | |||||||||||||||
WFA0150 | Female | |||||||||||||||
WFA1000 | Yes | |||||||||||||||
WFA1010 | Internal | Yes | ||||||||||||||
WFA1020 | Internal | Yes | ||||||||||||||
WFA1051 | Internal | Yes | ||||||||||||||
WFA1100 | Yes | |||||||||||||||
WFA2001 | Male & Female | Internal & External | ||||||||||||||
WFA2002 | Male & Female | Internal | Yes | |||||||||||||
WFA4001 | Male | Female | ||||||||||||||
WFA4002 | Male | Female | ||||||||||||||
WFA4003 | Male | Female | ||||||||||||||
WFA4100 | Male | External | Internal | |||||||||||||
WFA4101 | Male | External | Internal | |||||||||||||
WFA4102 | Male | External | Internal | |||||||||||||
WFA4105 | Male | External | ||||||||||||||
WFA4106 | Male | External | ||||||||||||||
WFA4107 | Male | External | ||||||||||||||
WFA4108 | Male | External | ||||||||||||||
WFA4109 | Male | External | ||||||||||||||
WFA4110 | Male | External | ||||||||||||||
WFA4111 | Male | External | ||||||||||||||
WFA4112 | Male | External | ||||||||||||||
Item # | 95 mm | D1N | D2N | D2NB | D3N | D5N | D1T | D3T | D1Y | D5Y | C-Mount | SM1 | SM30 | SM2 | 30 mm | 60 mm |
Female | ||||||||||||||||
Female | ||||||||||||||||
Female | ||||||||||||||||
Female | ||||||||||||||||
XT95P12(/M) | Female | |||||||||||||||
ZFM1020 | Female | |||||||||||||||
ZFM1030 | Female | |||||||||||||||
ZFM2020 | Female | |||||||||||||||
ZFM2030 | Female |
Posted Comments: | |
No Comments Posted |
Item # | CSN500 | CSN510 |
---|---|---|
Number of Objectives | Five | |
Objective Threads | M25 x 0.75 | RMS |
Parcentricity, Single Positiona | ±10 µm | |
Parcentricity, All Positionsb | ±40 µm | |
Parfocality, Single Positionc | ±2 µm | |
Parfocality, All Positionsd | ±10 µm | |
Required Mounting Arm | CSA1400 Mounting Arm |
Click to Enlarge
The CSN510 Nosepiece mounted with the CSA1400 arm in a DIY Cerna System.
- Five RMS- or M25 x 0.75-Threaded Objective Lens Ports
- D1T Dovetail Mounting Interface for Compatibility with the CSA1400 Mounting Arm
- Bi-Directional Repeatability: ±40 µm
These nosepieces hold five objectives in DIY Cerna systems. They are ideal for constructing systems that require multiple low- and high-magnification objectives. The objective turret's housing and threads are made from lead-free bronze, with an aluminum back plate. The precision detent mechanism is designed with a hardened 440C stainless steel ball on a cantilever spring that engages the grooves machined into the bronze housing. The detent mechanism can position the objective lenses with a bi-directional repeatability of ±40 µm. The table to the right gives performance specifications for the turrets when integrated into well aligned systems, where all components are aligned horizontally and vertically to the optical axis. Every nosepiece is tested and shipped with a data sheet.
The CSN500 nosepiece is compatible with M25 x 0.75-threaded objectives, while the CSN510 accepts RMS (0.800"-36)-threaded objectives. We do not recommend using thread adapters with these holders because centricity misalignments may occur.
Each nosepiece has a male D1T dovetail and can be attached to a motorized focusing module via the CSA1400 Mounting Arm (sold separately). Recessed magnets on the CSA1400 arm mate to the bellows included with Cerna microscope bodies with epi-illumination arms, creating a light-tight optical path between the nosepiece and the epi-illumination arm. On a DIY Cerna System, the nosepiece should be mounted with the dovetail facing away, so the nosepiece tilts upward, as shown to the lower right.
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The objectives can be changed by manually rotating the front face of the nosepiece.
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The CSN510 is shown with objectives of increasing magnification.
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The back of each nosepiece has a D1T dovetail. This dovetail is used to attach to the CSA1400 Mounting Arm.